Hello, this is my first post but i have found this site to be invaluable. I just put intake gaskets on my engine and there is a barbbed vac. outlet off of the riser that i just can't find where it goes.... I am assuming it goes to the HVAC because my doors or ac won't work. I have looked everywhere for a place for it but it must be hidden somewhere....Pic. would be great....HELP!!! Thanks