Okay, I swapped motors once on my car...but I did it again and now am confused about a vacuum line. I have the hotshot cai. and the big "nipple" on it facing the rear of the car...I have no idea what hose connects to it. It is right next to the little nipple that connects to the egr (which I have plugged off since I no longer have one). If anyone knows please reply.
Thanks

That is for your AAC.

It connects to your manifold @ #3 see pic

http://www.sr20de.org/images/images/NX%202000/intake%20manifold%20TB.jpg