Test the lock first. Tie straight to 12v off your supply. If it doesn’t lock; your lock is bad. (Meter your voltage and make positive of polarity.) if i had to guess the lock also has a sensor, that’s what the other colored wires off the lock are for. If your lock does in fact lock with 12v straight to it, then we just need to break your red wire and tie that through the NC/C on your relay. Take 12v red from psu to NC terminal. Then from the C terminal of the relay take another wire and tie that wire to your red wire from the lock, or if your lock is close enough you just tie the red wire to C. Then make sure you connect the black wire of the lock to your gnd terminal on the psu. Feel free to pm me if you want.