I think there is something I am missing. I am trying to install the heater flap cable in the picture in the dash. It has to be connected to the heater first and the heater installed b then the dash can be installed and then the cable. I expected to drill a hole in the dash and remove the Knox and push it through from the back side. The knob seems to be glued or welded to the cable. Expected a set screw or a push on knob or something. Now I am confused. What am I missing?