i know you lot will call me sad ,but need help fitting a dump valve to a tdi??

hi got all the bits to fit my dumpvalve to my mk4 gt tdi but not sure which vacuum pipe on the bulkhead you cut into for the t piece to go into the top of dumpvalve it self,has anyone got any ideas please?

 

ive got a feeling youll struggle to find a vac pipe, or even a vacuum as without a throttle, there you gonna get a vacuum from?

 

Mk 4 TDI`s dont like atmosperic dump valves it confuzzles them.

 

loads off vac pipe's all over engine

but which one is a vac on off throttle is going to be the prob

and as stated dont think they work well on the PD's as it confuss's the system