Perrin EBCS Pro Hose Routing!

[H9 Scoobi]

Hi All,
I am going to fit a Perrin Pro electronic boost control solenoid this week. As i am going to get my car tuned by JGM on Wednesday. Now i have never fitted one of these before. And i would like a little help with one hose connection on the solenoid please It might seem a bit dumb of me but i cannot figure out where this one hose has got to go. It is the NC port the normally closed port which is the vent port.
This is what it say's in the instructions so any help would be muchly greatly appreciated.

Using supplied hose, connect port to turbo intake system or OEM hose going back to turbo intake system. NOTE: This is the vent for EBCS Pro and it’s very important to not restrict or block this off or undesired boost control will occur.
It is also acceptable to leave this port open to the atmosphere. If this is done, make sure and block off port at turbo intake, or a vacuum leak will occur.

Now i have not got a clue where this hose goes so if someone could shed some light on it for me. I would be very happy lol A diagram would help to thank you all hope i can get this sorted for this Wednesday!