Does it have a line to the waste gate from the pressure side of the system before the throttle? Despite it being a spring, it still needs to know the system pressure.
If there is a brass filter looking thing on the side of the WG, (I dont see one from your pictures) that goes on TOP, the banjo fitting goes on the side, and the other connection goes to the pressure side. I don't think you can come off a vac. line as that is AFTER the throttle. If you have variable boost control, then the top no longer goes to the atmosphere, but to the BOOST controller - not a fuel regulator.
On the fuel side -others here are much brighter than me. (Wait, wait - Check that - they are much brighter than me on all these issues - I am just here to torment folks)