hot/cold control cable

That clip over the cable sheathe hooks over one side then snaps down on the other side. The side to lift ahs a hole for a screw just incase that little finger breaks off. You can poke a small screw driver under it to pop it off but it may take off , never to be found again. When it goes back on it sets the travel of the door per the length of sheathe beyond the clip. Hope this helps.