Vacuum line on MAP

Hello,

I have a 91, 3.1 Euro. On the MAP sensor is a vacuum line that goes to intake and on to fuel regulator. The other line is bigger and rubber, about 18 inches long. Where does this connect?

I can feel suction when I give the engine gas so it must need to be connected to something.

Any help, please.

Power br. booster, pcv valve?

I can't find anywhere on the power booster to plug in and PCV hose is attached already. This hose is about 18 inches long and the way it's positioned should connect to something on the drivers side.

Purge valve?

Where is the purge valve? And what is it? I looked on auto zone web and got nothen.

I know this hose attached to something because it has a permanent bend in the rubber now from being hooked up for years.