The is 100% not OEM. Pull your carpet and trace where it goes. Just noticed you are in Ottawa. If you want, DM me and I will take a look for you, I am in Kanata. I install kill switches into JLs for free. Also check out OJC FB group.
I think this cable is stock/OEM .. it runs from underneath the sealed carpet up under the seat...it may have just come off / disconnected with all the crap that's been under the seat? I have leather / heated seats, may have something to do with that, although the seat heats up.
Also having a fuel sensor issue , fuel level always showing empty and check engine light on, but runs fine, scanner showing P0463 error, wasn't sure if this would have anything to do with that.
I am not sure, but could it be for the detector for the seat being occupied. I have 2020 Wranger but have never looked under the passenger seat. However I do know that it will detect if the seat is occupied and then if the seat belt is not on the person it will give a seatbelt warning.
The connection for the center console, usb ports and rear windows is under that seat. Some bus and other wires also pass through the area. There is a lot more going on under the seat besides seat functions. Maybe it was for convenience, but the wiring under the seat is poorly designed and executed.