Question to BSoD Tutorial: Arm rigging example

Hello there,

Im totally frustrated. I tried for hours but I didnt get any functional result. :frowning:

BSoD describes in his Tutorial: how to rig an arm.

I tried buildung option 2. I don`t know how to set the relations between the bones. He puts a “track to” constraint on the arm bone. Looks like it tracks to “armIk”. But on which bone is the “Locked Track” constraint and what is the target bone?

If anybody got that working:eek:, please answer me.