Heh, I wasn't explaining things very well, but I just had an epiphany.

Anyway, the part you'll have to swap from your EF seat to the GSR seat is that inboard hinge part. It unbolts from the seat back and side of the seat pan. You'll have to undo some of the upholstery from the seat back to get at the two, or maybe three, bolts that go up the side of the seat back.

I apologize for the confusion.