Question Combine "hand gesture (Index controller)" with 3 point tracking (SteamVR)

How do I combine "Camera rig" with "Player" prefab?
Or how do I setup my avatar that has functioning 3 point tracking to do finger tracking?

I'm learning to use 3 point tracking on a humanoid avatar with FinalIK and SteamVR plugins. I was able to track 3 points, head and both hands. However I was not able to setup finger tracking with a Index controller. I had used "Camera rig" prefab to do 3 point tracking. I can also use prefab "Player" to track fingers.

I've looked all over the internet couldn't grasp the concept of setting it up.