01 Xterra AC; engine diagram anyone?

[noidea]

I was looking to trouble shoot my AC (blowing, but not cold) and when I got under the hood I found a couple of things that didn't look like they were connected as they should be. Does anyone have a diagram or some pics of the engine? I know the basics but if I start blindly messing around, Im liable to hurt someone....The engine is model VG33E. thx in advance for any insight