Vacuum hose?

[kdlawrex]

I just finished replacing timing belt and valve cover gaskets. I only have one part left over. I know this hose goes on the rear of the engine and can even find one connecting point even thought I literally have searched for hours. The truck starts fine but the open port does suck alot of air and the engine smooths out when I plug it. Im attaching two pics. Can someone help me with this and send me a pic of both ends on the engine?

 

[wbailey]

Is that the line to your PCV? I just did a timing job and almost forgot it, it runs from the top of the bank 2 valve cover to the right side of the intake manifold.

 

[BostonJon]

Is that the one that’s under the throttle body?