Need info on Challenger vacuum lines

[SublimeChallenger]

I have a 70 Challenger with A/C. On the firewall (engine compartment side)under the blower motor there's two vacuum lines coming through which someone cut. I assume they must be the lines for the heater/ac controls. Does anyone know how the factory had them routed and where they hooked up on the engine? Is there supposed to be a tee to connect them to each other, and then to the manifold or carb base? It's an A/C car, no power brakes, 4 speed, so I don't have any other vacuum lines coming off the engine. If anyone has an e body with a/c I'd appreciate the info.