PCV-Vac-Advance routing

I'm feeling pretty dumb about now. I just got out my mirror and checked the back of the carb. Low and behold, there's the port I'm looking for. Now that explains why I couldn't get the damn thing running either. So, with that part out of the way, which of the two smaller ports on the carb should my vac advance be connected to?

back of carb.jpg