Step 6

Now tighten the M6 clamping bolts of the altitude adjusting arm.

It goes without saying that not too much force is needed.

A little tightening gets things already deadlocked.

Un-tighten the M6 clamping bolts from the sideplates again.

No adjustment in altitude can be made with these bolts tightened,therefore these bolts have to be  tightened after you did your polar alignment.