Only line you wanna run to that intake manifold is the blow offf or another line off your intake to a afr gauge. Your booost or wastgate line which ever you prefer to use should run from turbo to wastegate just changing your spring alone will be fine but I wouldn't suggest a green spring not to safe with the boost creep u could see probably up into the 11s for boost which I've heard is ur looking for a problem when going that high without a forged motor .safer way would be a red and natural spring which gives u almost 7psi with a creep to 8 maybe mid 8
The Hahn system doesn't run to fitting on turbo. During testing and tuning at Bob's place they found that plugging the turbo port and pulling the wastegate reference from the intake side had a much smoother reaction on the BOV and the held the wastegate closed till 7.5 PSI with a peak of 9psi. They made all the tuning dyno runs with it setup in this configiration... Also it seems that there is a very noticeable stutter when speed shifting if the vacuum is pulled from the turbo on the Hahn.
I kept my vacuum lines routed this way on my Alpha setup and it seems to work flawlessly. However with the new boost controller I'm sure it may be different when I pick it back up from DDM.
With the Hahn setup I have all my vacuum/boost references pull off of the fitting below the throttle body. I use 3/8 fuel hose to run to the BOV and then T it over to my wastegate. And I have a smaller fitting that supplies my AEM gauge.