300g Electrical and vacuume issues

I bought a 300g a few months ago. I'm looking for the vacuum hose gromet that goes through the firewall. Im also looking for details on the brake lights. Mine do no work, i know that later mopars go through the turn signal switch, is the same true on the 61 Chryslers?

My G has ac, does that change the vacuum hose routing to the engine compartment? it looks like the top half was cut off.

Thanks