How to fit a dump valve to an escort rs turbo

Not sure what I’m doing what vacuum hose do I need and what size T-piece , I tried to use one from a boost gauge and it didn’t work

Also what pipe on top of the inlet do I use....rely am lost tried connoting it to ecu pipe and car just stalls
The D/valve did come from a ERST, its a bailey item.....not sure if its twin or single, but I herd it on the car just cant remember how it was fitted, On my inlet on the right had side the pipe runs to the ECU????? If you’re looking at it from the front, (head lights)

Rely having problems here is a pic of the DV