I have a 420a turbo setup and want to reconnect my boost gauge. The problem is I dont know which vacuum line to splice and put a T on. I already have everything else set up. Ill post pictures to show setup ina sec. I the "area" in which i should splice. The right line in the intersection goes to the BOV. the left goes to fuel regulator as you can see. The middle line goes to the fuel rail.

Thanks for help in advance !