PCV harness for boost gauge vac

[deez87]

Hey what's up fellas? I got a little issue here; over the weekend I installed 42.5# injectors and TT chip and is running cool. my dad unhooked most of the fuel rail bolts and connections and when it came time to hook it all up, he couldn't remember where this connection for the boost gauge vac goes to(its the bigger connection with the screw-on adapter). So I've been looking and I can't find anything that would screw on this fitting so if anyone knows what I'm talking about please let me know.When I start the car(87 GN) I can hear a whining-type of sound. Any input would be much appreciated. Thanx. Damian