Trying to do all the used car fixes to make the car I just picked up run like new again. Part of that process is running seafoam in the vacuum lines.
On the n/a AJ16 engines there was a little port on top of the intake manifold that I could connect a hose to but for the s/c engines the supercharger sits right on top of the intake manifold and now I can't seem to find any ports for the vacuum. Since I am unfamiliar with the supercharger system right now, I don't want to just start unscrewing things and mess up something the process.

I've tried looking for diagrams but I can't find anything again

 

There would be two places that I would access the vacuum lines. First place would be the line that comes from the rochester valve to the front of the car and into the throttle body intake just before the sc. Its a metal line at the firewall that is connected to a rubber hose that goes into the throttle body adapter. Or you can simply get access from the top of intake manifold at the fuel pressure regulator. I would think that if you place seafoam at the tb adapter it would make a mess of you sc rotors and all that sludge would go into your sc cooler, intake manifold and engine. 96-97 have egr valves and sc rotors get covered in carbon, this is good thing because it keeps tolerances up and boost benefits. 95 xjr does not have egr valve. what benefits would seafoam give you????