I had a guy swap my car to A4 when he was putting a new motor in my ss. I'm going to put it back to a t56. ( he is I mean). I bought the speartech adapter to make my t56 wiring harness work for the a4. He wanted me to find out what would need to be done with that harness when it it swapped back. Can it be left alone or does it need to be completely taken back out?

 

anyone?