I finally got the dash back in my S4 GXL after oh about 3 years of restoration. Would you believe it, I have an extra connector. I can't verify what the connector is used for.

It is located directly behind the glove box (see pic). I did some searching and the theft deterrent control unit(which I chucked long ago) is located behind the glove box. I looked up the connector (F-77) for the theft deterrent control unit, but the wiring colors aren't exactly the same as the pin out in the FSM. Anyone know for sure? Thanks guys.

 

Mine is unplugged too.It wasn't hooked up when I got the car,and it has no Theft system.
I wouldn't worry about it.