Endoscope Camera with Light,1920P HD Borescope with 8 Adjustable LED Lights, Endoscope with Semi-Rigid Snake Cable, IP67 Waterproof Inspection Borescope for iOS and Android-16.4ft Single Lens

Something like this one: https://www.amazon.com/Adjustable-Semi-Rigid-Waterproof-Inspection-Android-16-4ft/dp/B0FXR9VFSV/ Make sure its long enough for your needs (also the ones that come with attachments are nice, the magnet is a lifesaver if you drop a screw/etc down some abyss) They're cheaper on Temu/Aliexpress but you'll have to wait a couple weeks for shipping

If you're that curious, rather than crowbar it and really screw it up, get one of those bluetooth inspection cameras and drill a hole small enough to stick it in. https://www.amazon.com/Adjustable-Semi-Rigid-Waterproof-Inspection-Android-16-4ft/dp/B0FXR9VFSV