It sounds like you are talking the piece that is spot welded on the bottom of the vent vindow frame they seem to be off on a lot of cars we do. what i do is weld it back on the vent window frame when I have the vent window out of the car it is there so you can tilt your vent window in or out for alignment it slides over a peg that is bolted through the bottom of the door where the plug is . Hope this helps