It's pretty straight forward.
Bottom (straight end) of the RJC connects to the turbo housing, and the top (L end) connects to the WG Actuator.
Start with the RJC controller adjusted out until you have 2-3 threads engaged, this is minimum boost. Too loose and you risk leakage around the threads.
Set your adjustable actualtro arm to the min boost setting also. The hole on the WG actuator rod should be about 1/8 inch to the short side of the pin on the WG arm whent he WG is in the closed position...you could set it a little tighter, but not necessary. Too loose and the WG won't be all the way closed and you'll have a hard time building boost.
With the above, you should be at about 15psi and it should be fairly stable.
Adjust the RJC tighter (shorter) from there based on what your tune will permit without seeing knock.
If you're running a stock turbo with a stock exhaust housing, you might experience boost creep.....keep an eye on it.