Air Solenoid routing question

I need some guidance as to the where the hoses go on the air Solenoid! I'm currently putting my 2000 SP1 back together and seem to have a remaining hose coming from the solenoid that has no home! I looked in the manual and it doesn't show the location for each pipe! Could some guide me on this one? On the picture the top hose is the one without a home, the one bellow is attached to the air inlet and the vertical one at the bottom is attached to the vacuum pump. I've not altered the pipes in anyway as this is how it was when I bought it from the previous moron.... From what I can gather judging from the book, is that it is currently wrong! but the book doesn't make much sense and the illustrations are hard to view on my PDF copy..... Help! 
