You have a clear (well, sort of... milky amber colored) plastic line going from the back of the passenger side of the engine to a small silver cylinder (the overboost protection valve) on the driver's side of the firewall. A second clear plastic line comes from there and runs to this little square gizmo on top of the injection pump (the ALDA).
Here's a picture of the driver's side of the engine:
http://www.peachparts.com/shopforum/attachment.php?postid=585565
The square thing under the black vacuum line in the bottom left is the ALDA. The milky amber colored line coming from it goes up and to the right; you can kind of see the overboost protection valve poking up behind the brake stuff there.