1999 Exploer XLS electric question

This truck has the manual seats and I want to install the power drivers seat from a 1996 (my wife is very petite-no way she sees over the steering wheel without a power seat). Everything matches up except the electric. There is a double wire with a yellow connector under the 1999 seat-which I assumed to be for power seats. Apparently not so-there is no power to it (this is not the seat belt connector). I've been thru the manual and cannot see what this is for, and I question whether the rather thin wire is adequate for the 25 amps that power seat pulls. I tried putting a fuse in the #2 slot in the under the hood power junction box for the heated seat option, but still nothing.

I am going to replace the passengers area carpet and will probably tap into the cigarette lighter wire and run it to the seat. Can anyone advise what that connector is for and if it would be adequate to bear that power seat load?

If I can remember correctly, that yellow wire should have a terminator plug in it. If so, that would be a wire that goes to side airbags, which I am not aware of 99's having that option. Every once in a while, I'll move my seat and it will fault the airbag system (code 38 drivers side or 39 pass. side). I had the seats out of my '99 XLT when I rebuilt it, but I don't recall what was available for the seat motor, but reason would suggest that it should be large enough to handle its current draw. Maybe Ford has yet another wire harness configuration that doesn't include the electric seat connector (which is available for that year), but has a connector for side airbags that wasn't an option! Go figure!