The PCV valve & hose is located underneath the manifold. There is a oil-trap 'box' attached to the back of the engine block. On top of that is a little plastic elbow fitting - that's the PCV valve - it looks like a hose barb. From there the hose goes to the intake manifold. If that's disconnected it would be a big vacuum leak.

You might get a better look at things if you removed the big air intake pipe coming from your air cleaner.