GT seat in Notchback ?

[Slow 5.0]

I currently have a pair of GT seat that came out of an 88 GT in my 86 notchback. They are in perfect shape, but I have one question. I want to connect the power lumbars on up and I'm lost on what I should tap into to wire them up. I know from previous post on other message boards, that one wire is the positive (Black) and one is the negative (black/white stripe).

What should I connect the wires to, to get this working?

Benny