Hello, I am helping someone trying to figure out this 92 Galant that has been sitting for a while. I have found that the vacuum lines where hacked up and put in random places or just missing completely. I have figured most of it out the only thing I'm confused on is where to find a boost source for this turbo. I do have an extra port on the throttle body but I don't know enough to figure out where to go from here. Pic is not mine however this is what I currently have. Any help is appreciated.

Port "P" is for vacuum and boost. Those other ports I believe have vacuum but no boost.

I used vacuum caps BUT they split/leaked after some time. I plugged mine with JB weld as I don't have emissions.