I found the leak while repairing the headlamp adjuster, and traced it down to faulty check valve (replaced) and that leaking line/device. Currently I have the line pulled from check valve and blocked off, as well as the empty output on the check valve.
The headlamp adjustment works fine, and doesn't effect anything else. As to A/C related operations, I do't have problems with anything, at least I think I don't.
The thing is, all(I think) the vacuum lines that go into the dash go through a grommet on the firewall. Where as this purple-grey line goes into a hole, behind the hood hinge, along with a red-grey line, which is the line for vacuum resvoir.
Hmmm...maybe that goes to the resvoir as well?