Heater Controls Vacuum Arrangment - VL V8

[VLmate]

Hello Again. Is there anyone out there who has a VL (or even a VK) 304/308 that can either explain to me or take a photo of the heater controls vacuum line arrangement in the engine bay (pretty much just near the fire wall. Specifically the T-Piece and check valve. My understanding is that the main line comes from the vacuum ball, then into a T-connection. One part of T-Connection goes to engine But where does it connect?? manifold??. the other part of T-Piece goes to through fire wall to heater control unit.
If people do not know answer to this, no worries, all I need is some photos.....please. I cant fin any information of net, or in manuals. My next step is to pay some one to look, but want avoid this,
btw it is all missing in my car and I need it for road worthy apparently.
Thanks. Heath.

 

[Smitty]

.. there is a vac tree at the back of the manifold
the vac line (and others like the booster) connect there