you didn't get the harness that connects to the evap. sensor?
One of them is ground which goes to pin #17 in the 20-pin connector in the head unit (this wire along with all other sensor grounds and air mix motor ground all connect into the same pin)
The other wire hooks to pin #9 in that same connector.
I don't know how to tell which is ground or the other since both are gray, i'm sure you'll figure it out or someone will tell you