what functions are you wanting to hook up? The square plugs in my car only had wires for: Drivers side> seat heat, rail position, seatbelt. I had to add the power and ground for the up/down motor. Passenger side> seat heat, pressure sensor(05 and up cars), seatbelt. My car never came with heated seats but the wires were all there and even had power going to them, I took out the center counsl found the plugs, plugged in the switches and I was up and running.
“I believe if life gives you lemons make lemonade…then find someone that life gave vodka to and have a party.”