Figure 2-4: a.) Pin Hole; b.) Exploded View of Pin Hole Assembly

6. The rectangular part of the pinhole will fit into the slit cut in the stem.  Make sure the screw holes are aligned. 
7. Once these holes are aligned, screw the part in to secure it from movement.
8. This part should now look like Figure 3-4 above, but with now pendulum ball attached.

Figure 2-5: Completed Pin Hole Assembly

9. This piece should now be inserted into hole 1 in shaft 1. 
10. This stem should be inserted into the hole until the desired lengths are reached.
11. When the desired length is reached, the set screw should be tightened so the stem will not be able to have sliding motion.