super six now where the heck do all these vacuum ports go to?

$2.25 add it to the $100's of dollars of advice you provide daily to the slant 6 crowd. OK so i undid the OSAC, left it alone. I experimented with the Thermostatic thing, it doesnt seem to operate (I connected it directly to the manifold vacuum plug, lots of vacuum). I then tried with my mouth to get that flapper to move. I noticed that there is a small nipple inside the air cleaner that seems to just be exposed. I plugged it and then I got plenty of vacuum to move the flapper up. Am I supposed to plug that small nipple in there? Also when I uncapped the manifold vacuum (that is normally plugged) on the manifold, the engine revved much higher? Is that correct? I though that if there is a vacuum line open somewhere in the system, the idle will drop?