diff --git a/include/nc_connector_wizard_db_bridge.inc.php b/include/nc_connector_wizard_db_bridge.inc.php
new file mode 100644
index 0000000..f7c3b85
--- /dev/null
+++ b/include/nc_connector_wizard_db_bridge.inc.php
@@ -0,0 +1,158 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_wizard_apply_known_database_profile(array &$state)
+{
+  if (empty($state['scan_ok']) || trim((string)($state['base_url'] ?? '')) === '')
+  {
+    return false;
+  }
+
+  foreach (bratonien_tools_nc_connector_connections() as $candidate)
+  {
+    $config = isset($candidate['config']) && is_array($candidate['config']) ? $candidate['config'] : array();
+    $candidate_url = trim((string)($config['nextcloud_url'] ?? ''));
+    if ($candidate_url === '') continue;
+
+    try
+    {
+      if (bratonien_tools_nc_wizard_normalize_url($candidate_url) !== (string)$state['base_url']) continue;
+    }
+    catch (Throwable $ignored)
+    {
+      continue;
+    }
+
+    $connection = bratonien_tools_nc_connector_connection((int)$candidate['id'], true);
+    if (!$connection || !is_array($connection['config'] ?? null)) continue;
+
+    $known = $connection['config'];
+    $db_user = trim((string)($known['user'] ?? ''));
+    if ($db_user === '') continue;
+
+    $db_password = '';
+    try
+    {
+      $plain = bratonien_tools_nc_connector_decrypt_secret($connection['secret_blob'] ?? '');
+      $decoded = json_decode($plain, true);
+      $db_password = is_array($decoded) && array_key_exists('db_password', $decoded)
+        ? (string)$decoded['db_password']
+        : (string)$plain;
+    }
+    catch (Throwable $ignored)
+    {
+      $db_password = '';
+    }
+    if ($db_password === '') continue;
+
+    $state['db_host'] = trim((string)($known['host'] ?? $state['db_host']));
+    $state['db_port'] = trim((string)($known['port'] ?? $state['db_port']));
+    $state['db_database'] = trim((string)($known['database'] ?? $state['db_database']));
+    $state['db_user'] = $db_user;
+    $state['_db_password'] = $db_password;
+    $state['db_password_set'] = true;
+    $state['source_view'] = trim((string)($known['source_view'] ?? $state['source_view']));
+    $state['activity_view'] = trim((string)($known['activity_view'] ?? $state['activity_view']));
+    $state['gallery_root'] = trim((string)($known['gallery_root'] ?? $state['gallery_root']));
+    $state['storages'] = isset($known['storages']) && is_array($known['storages']) ? $known['storages'] : array();
+    $state['storage_candidates'] = $state['storages'];
+    $state['technical_source'] = 'Gespeicherte Reader-Verbindung wird erneut geprüft';
+    $state['technical_error'] = '';
+
+    return true;
+  }
+
+  return false;
+}
+
+function bratonien_tools_nc_wizard_scan_with_known_database()
+{
+  $result = bratonien_tools_nc_wizard_scan();
+  $state = bratonien_tools_nc_wizard_state();
+
+  if (empty($state['scan_ok'])) return $result;
+
+  if (!bratonien_tools_nc_wizard_apply_known_database_profile($state))
+  {
+    $state['db_user'] = '';
+    $state['_db_password'] = '';
+    $state['db_password_set'] = false;
+    $state['technical_complete'] = false;
+    $state['technical_stage'] = 'database_details';
+    $state['technical_source'] = 'Keine bekannte Reader-Verbindung gefunden';
+    $state['technical_error'] = 'Für diese Nextcloud ist noch keine bekannte Datenbank-Reader-Verbindung gespeichert. Die Nextcloud-Anmeldedaten werden nicht als PostgreSQL-Zugang verwendet.';
+    bratonien_tools_nc_wizard_store($state);
+
+    return array('message'=>'Nextcloud wurde gefunden. Für den Datenzugriff wird eine separate Reader-Verbindung benötigt.');
+  }
+
+  try
+  {
+    bratonien_tools_nc_wizard_finish_data_access($state);
+  }
+  catch (Throwable $e)
+  {
+    $state['technical_complete'] = false;
+    $state['technical_stage'] = 'database_details';
+    $state['technical_error'] = $e->getMessage();
+  }
+
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($state['technical_stage'] === 'database_details')
+  {
+    return array('message'=>'Nextcloud wurde gefunden. Die bekannte Reader-Verbindung konnte noch nicht vollständig bestätigt werden.');
+  }
+  if ($state['technical_stage'] === 'mounts')
+  {
+    return array('message'=>'Nextcloud und Datenzugriff wurden bestätigt. Ein Speicherort muss noch zugeordnet werden.');
+  }
+
+  return array('message'=>'Nextcloud und die gespeicherte Reader-Verbindung wurden erfolgreich bestätigt.');
+}
+
+function bratonien_tools_nc_wizard_save_technical_with_known_database()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if (empty($state['scan_ok'])) throw new RuntimeException('Bitte zuerst Nextcloud erfolgreich scannen.');
+
+  if (trim((string)($state['db_user'] ?? '')) === '' || (string)($state['_db_password'] ?? '') === '')
+  {
+    bratonien_tools_nc_wizard_apply_known_database_profile($state);
+  }
+
+  if (trim((string)($state['db_user'] ?? '')) === '' || (string)($state['_db_password'] ?? '') === '')
+  {
+    throw new RuntimeException('Für diese Nextcloud sind noch keine Datenbank-Reader-Zugangsdaten bekannt. Nextcloud-Benutzer und -Passwort werden dafür bewusst nicht verwendet.');
+  }
+
+  $state['db_host'] = trim((string)($_POST['nc_wizard_db_host'] ?? $state['db_host']));
+  $state['db_port'] = (string)max(1, min(65535, (int)($_POST['nc_wizard_db_port'] ?? $state['db_port'])));
+  $state['db_database'] = trim((string)($_POST['nc_wizard_db_database'] ?? $state['db_database']));
+  $state['technical_stage'] = 'database_details';
+  bratonien_tools_nc_wizard_store($state);
+
+  if ($state['db_host'] === '' || $state['db_database'] === '') throw new RuntimeException('Die Adresse der Datenbank ist noch unvollständig.');
+
+  try
+  {
+    bratonien_tools_nc_wizard_finish_data_access($state);
+    bratonien_tools_nc_wizard_store($state);
+
+    return array(
+      'message'=>$state['technical_complete']
+        ? 'Datenzugriff wurde erfolgreich geprüft.'
+        : 'Datenzugriff funktioniert. Ein Speicherort muss noch bestätigt werden.'
+    );
+  }
+  catch (Throwable $e)
+  {
+    $state['technical_error'] = $e->getMessage();
+    $state['technical_stage'] = 'database_details';
+    bratonien_tools_nc_wizard_store($state);
+    throw $e;
+  }
+}