Can you help a feller identify these seats?

I was thinking 73 to maybe 76 Duster, but I'm not sure. Also why is there an electrical connector underneath them....its looks like a ground of some sort to me. Appreciate any help.

BTW, my God seat covers have gotten expensive. I saw $850 on ebay just for the fronts with no foam (Legendary)20210927_180629.jpg 20210927_180644.jpg 20210927_180535.jpg 20210927_180513.jpg