1. loosen the bolt, insert the lower stem into the search coil and lock it
(see graph1). The rubber washer should be located correctly.
graph 1
2. Insert the control box into the hole in the middle stem grip, spin into
the 3mm screw and tighten.(see graph 2)
graph 2
3. Relax the LOCK NUT on the middle stem. Press the silver-white
5