ᐅ Locating electrical cables connected with Wago connectors behind drywall...

Hello everyone,

I have a problem, but I think it’s manageable.
I installed suspended ceilings throughout the house and laid cables everywhere for the spotlights, so I can drill later to install the spotlights. Now everything is connected and the ceiling is finished, but I can’t find my plan showing exactly where the cables are located underneath.
Is there a detector that can locate the cables or check the wiring connections, or what is the best way to do this? Removing the ceiling again would be the worst option.

Best regards and many thanks