Folks, heating pads are unique to each model due to the cut outs you see. the cut outs are for the seat cover to be anchored to the frame by the hog rings. If you think you are going to use a generic heating pad or a heat pad from a different model it will not work. You will have no way to thread the seat cover anchors trough the seat to the frame.
In addition seat bottom and seat back elements run through one continuous circuit and require a thermal limiter so you don;t burn your leather or roast your fanny.