I have an '88 735 that came with poorly installed seats from newer model 7 series. I think the new seats are form a 92-3 model car. My question is about the wiring harness, it is slightly different in the 735 than what the seats have coming off of them. The laregst plug (the big black one) coming from the car is smaller than the receptical on the seat. All other plugs seem to have an appropriate home and I can figure them out. I am not sure how to handle the plugs that don'tline up. Any help would be great.