I looked in every section of the service manual I have (I don't have the whole thing, damn download policies on their site).
There are some images in a thread on
Scoobymods regarding the 3/16" restrictor mod, maybe that can help. Actively searching for more though.
EDIT: Ok found some more info.
This is from
this thread on NASIOC:
"the one with the pill goes to the inlet tube - just drive... if you get wg boost you have it hooked up backwards" The "pill" meaning the restrictor.
The thread starter posted this:
compressor side with pill, T to Y for ABC, my question is on the factory boost controller solenoid *ITSELF*, there are two ports, one in the center of the cylinder and one on the bottom... which one goes back to the intake/inlet and which one comes from the T at the turbo?
To which the response was "you have it backwards, the top one goes to the intake, the lower one goes to the wg."
I hope that helps. Its the closest I could get without going outside and pulling off my heatshield and looking.