...ive got a '91 Civic dx converted to multipoint and jumped to obd1...

Yesterday the car threw a CEL for a code 1, I checked the o2 sensor out and it appeared to be ok. I replaced it with a brand new Bosch one just to be safe and reset the ecu. I started to car back up and its still throwing the code 1. I pulled back the carpet to check the wiring at the ecu and sure enough there is a wire coming from pin D14 that is disconnected. This is to the o2 sensor but I cannot find where in my harness that it was connected to! lol

If anyone knows what wire or color of wire this is supposed to go to please help me out! This is my daily driver and runs like poop