Here's a pic of my piggyback AOS. The o-ring at the drain started leaking, thus the bit of paper towel in there.

And a pic of the engine. You can see the plumbing in the upper left corner. I cut the fitting end off the Porsche AOS and screwed in a brass fitting for the hose. Did the same on the intake tube. There was another smaller vacuum line that needed to be spliced in, so I used a brass T fitting.