Help with stock EFI

Did you get the lights working? If not, do you have the three wire connector at the transmission connected to the car wiring? Do the back up lights turn off with that three wire connector unplugged from the transmission?
Haven’t quite figured it out yet. They were off when he headed to school but were on when he got home. I don’t have the front 3 wire plug hooked up, just the one for OD and TC lock up. His slant six tranny only had a wire for neutral safety, nothing else.