I'm still waiting for my mityvac to arrive. Maybe tomorrow. Can anyone tell me: on my 240d automatic, I have 2 vac lines to the key switch. Where do these get plumbed into the lines in the engine compartment? They are brown and brown with a purple tracer. I believe one goes to the bottom of the injection pump shutdown. What about the other?

Next, I've been viewing a vac. schematic and there is a part labeled "central plug". Is this the bit that hangs just inside the firewall and connects the climate control & door locks on the reverse side, and has most of the major plumbing on the front with a line coming from the major 'T'? Or is the central plug on top of the valve cover?
Mike