Today i saw a vacuumconnection was empty on top of the throttlehouse, i dont know if there will be a hose or only a cap on it.
I have a A6 avant quattro -95 with the 2.6L V6
I looked at vagcat.com but that connetion were'nt on that exploded view

Do any of you know whats should be there?
Marked with a ring

http://www1.garaget.org/gallery/archive/51520/344843_0ljpx2.jpg