Another Vacuum Line Question

[z3beemer]

Gentlemen,

I'm building an 87Gt that had many of the vacuum lines disconnected when I got it. Now that I'm in the reassembly stage I need to be sure I have them all connected properly (need to meet emission). I have been unable to determine where one of the lines connect to and hope someone can help. On the passengers side behind the strut tower there are two solenoids. I thing I've determined the one on top is the EGR Vacuum Regulator solenoid. It has a small approx 1/8" vacuum line coming off of it. What / where does it attach to?

I believe the bottom (2) solenoids (they sit side by side) are the Thermactor air bypass and the thermactor air deverter solenoids and their vacuum lines connect to air pump piping (correct me if I'm wrong).

Thanks in advance for your help!

Paul