Is the bottom line on the Charcoal Canister supposed to be connected to something?

Red Dragon

Keep That on the Down Low
Jan 5, 2006
318
0
0
Austin, TX
Is it? I took mine off along with half the engine to get ceramic coated and I pulled the canister off and the vac line looking line on the bottom lead off down towards the elbow ans then nothing... is this supposed to be unconnected? I looked around and didn't see a place for it to be plugged into. If its supposed to be connected, what has been happening without it connected? It has been this way for a very long time.

Thanks