Seat belt buckle sensor connectors
 

On my 99 TypeRS I was debugging my seat belt light being constantly on, I first noticed that under seat there was unconnected 3-wire seat belt connector that based on measurements seems to be the seat side buckle connector.

After hunting a while under the seat, I found slit in the carpet with stuck in, but that connector was not match to mine also it had this red short circuiter pressed in, so I suspect that my seats have been swapped out at some point.

If that wire is shorted under seat, wouldn't that indicate that seat belt is not connected and not vise versa? If I measured correctly, buckling-in broke the circuit and not bucking had short circuit on my 3 pin connector.

I couldn't detect any seating detector on drivers seat (which wouldn't make any sense anyway), also I didn't find seat belt buckle wiring on the passenger side at all, is this normal?

I probably need to pull the CPU 2 also and debug that, too bad 99 spec manuals are not available..

I'm going in for initial registration inspection, and constantly burning seat belt sign might cause trouble and I'd rather not pull the dash right now (although I'm missing MIL light too)

EDIT: Just removed the press-in short from under the seat, and seat belt light is now out. Probably someone swapped in more recent seat from 2000-> that had 3p connector and couldnt get it to work and just tried to short the wires instead of trying with leaving the connectors open..