Vacuum Diagram

I have just completed a complete rebuild of a 2007 Aveo I got off a friend for $1 so my kids would have a car to drive. Everything is good to go now and the car runs like a champ but I have a Vacuum line that I can't figure out where it goes. It is coming off the back side of the Intake manifold. Any help would be great
Thanks
Aaron

Maybe this picture would help. I could not find the complete vacuum schematic in the manual. This is showing the intake manifold from the top.

Attachment 10815

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Originally Posted by xintersecty

Maybe this picture would help. I could not find the complete vacuum schematic in the manual. This is showing the intake manifold from the top.

Attachment 10815

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Hi, I was wondering if you could tell me what is that little round thing right next to the manifold ? please. The one with hose lines that go back to the firewall. Thank you