1970 Duster heater valve, and engine compartment Placement

Can anyone help confirm if the water heater valve on a 1970 Duster ( 318 w/AC ) has a push/pull style vacuum actuator. My service manual shows a two inlet vacuum system. But the car has only a single vacuum line connection on the valve. Applying vacuum open the valve.

When I bought the car it was just hanging. I can find any pictures where this really belongs. I suspect passenger side near firewall on the inside fender well, but would appreicate it if anyone has a nice engine compartment picture that they could send it to me.


Thanks in advance.