Paul, I went out to try to take a picture and this is the best I could do. Pretty bad, I know. It's impossible to actually see where it goes, so I had to just stick the camera in there and hope for the best. Near as I can tell, the line simply lays atop the transmission and is clipped in place somewhere up near the shift tower.
There should be a plastic vent on the end of the tube. Be sure it's there before you stick it up on the transmission. If it were me, I'd just stuff it in there and zip-tie it to the wire harness in the picture.
Ryan