I figured out how to re-attach the mirror head with clip.
1. Position the mighty scan stable on a table or your lap with the motor head at the top (farthest away from you).
2. Position the mirror with the mirror motor wire harness on the right and hold the fastening clip on the left with fingers.
3. The clip straddles the mounting bracket. Holding the clip between the two brass stopping pins on the left, slip the motor axle through all 3 holes. (1 side of clip, 1 on mirror bracket, and 1 on the other side of clip.
4. Turn the clip clockwise. This amazingly locks the clip in place. Hope this helps!
Dave with
www.FUNDJ.com