i agree with checking the other wiring, even if you have to pull a seat out to have some room to look.

The wiring lead would be available as well as a kit to re pin it from the dealer parts, but you need to be patient with them as its not a common order. Your best bet would be to cut a used one with a few inches of wire to splice in there. Just need to find one in a junkyard or being parted out.