Belt slippage/Loose motor screws

Hey guys former torqueboards fanboi, and full time newb here.

I had an issue over Thanksgiving where the 4 bolts connected to the motor would slip and cause the belt to come loose.

Must have tightened and retightened the thing 5 times in 3 or 4 hours. Realllllly looking forward to that TB or BKB gear drive.

Any tips for how to eliminate or reduce the issue? The loctite didn’t do the trick unfortunately…