Ok back to the drawing board. The junkyard wouldn't let me bring a jumper/power supply into the yard. I was like "!, then how the hell am I supposed to remove a power seat if you won't let me apply power to it?"
The ignorant, fat, lazy, A-hole at the counter just looked at me with his lazy eye and a dumbfounded look on his face and said "I don't know, I just don't know"
So I guess I'll try again tomorrow with the Jumpers on the cordless drill battery method. Hopefully they don't protest to me bringing a cordless drill in. And hopefully my drill battery is powerful enough.