Help with stock EFI

Thanks for the info. Took the car for a couple shake down runs up and down our road. Doesn’t run too bad, shifts a little fun for 2nd to drive when shifting manually. Got a few noises to figure out, but thinking most are exhaust related. One thing that has popped up that I find odd is that the back up lights are on in every gear except part. And suggestions what might be causing this?
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?