HH56 wrote:

Instructions on mounting the switch are in the book I suggested you download. There should be two screws or at least two holes in the bottom of the defroster channel near the original L defroster duct flange. That duct flange is cut flush and eliminated with AC so there should be some kind of flat plate covering the remaining hole. The switch mounting screws could be part of that plate or helping secure the plate. The switch mounting slots slide over the screws and assy is tightened in place. Switch has a slight offset with the shaft angled toward the dash hole location. A gentle curve of the flex cable will provide the drive connection to the knob.