Wire with round connection in jack storage area

I have a 2008 GC SXT and just noticed a wire with a round end in the jack storage area, does anyone know what this wire/connector is for. The connector is about 1/2 in diameter.

If you could post a picture of it, that might help someone identify it.

Just one wire in this connector? Short of a picture, what color is the wire? Should see a color stripe on it too. That will let me ID it on a wire diagram.