ok, Im doing a non-obd to obd-1 conversion for a B18, and everythings plugged in on the motor, but I found a plug on the motor right next to the lower radiator hose and I have nothing to plug it with...
also, theres a small squarish plug behind the motor on the wiring harness itself that is not plugged into anything...not sure what thats for either?

BTW im using a 92 integ obd-1 harness..

 

post a pic

 

I would..but no camera but if you have a obd-1 motor, the plug is right next to the lower radiator hose, where it goes into the motor...I already checked other non-obd motors, they dont have this plug.

 

I did a B18C1 swap in my 92 Civic HB i have the same plug that's not in use every thing works fine