Ok, so I'm retarded and forgot to label two connectors that go on the side of the cylinder head. They are both 2 pin connectors. One has to be the coolant temp sensor on the side of the cylinder head which I believe is the black one; then there is a green one. I have no idea what it is for. Shown in the pic below. Please help me!

 

Just curious, what year TSX is this?

If the wire colors are Yel/Blu and Blk/Yel, then it is for the EVAP canister purge valve.

 

2004
Aaaaaahhhhh, that's exactly what it is. I forgot to bolt that damn thing up which is why I couldn't figure out where the plug went. Thanks!!!

I don't suppose you know of a quick link to a vacuum diagram do you? lol