Somery

According to the vacuum diagram, if you don't want the one that rides with the green one then the one you are looking for goes to the vacuum tree. If it matters, I followed along the red lines and it's the bottom/right of the two red lines shown in the tree close up. The top left one goes to the pressure regulator.

superduty

White went to recirculation and black went to selector. The black is on the t it looked fine but it was hot enough to collapse the hose not allowing flow. Just cut some off and hooked it back up and now its working great. I was just about to rig the selector with a zip tie and could hear it and was able to track it down. I appreciate the help guys.