Help with AC/Heater Harness

Okay, so I think I figured out where the two blue wires go. Going back some old pictures, I noticed there is a relay on top of the AC box that looks like the old blue wires were plugged in. Since I eliminated the AC from my car (even though I still have the AC box), I guess it didn't occur to me to go back and look there. So that problem seems to be resolved.

Also managed to answer my own question on the ammeter after reading through FABO a little bit. Never paid attention to the word RED printed on the circuit board.

So now I still could use some insight on the vent hose install question. Thanks.