AC vacuum question

I am working on an AC system from a 73 Valiant and the 73 FSM is showing a vacuum transfer switch in the circuit but I do not see anything like that on my system. Attached is a picture taken from page 24-50 of the FSM showing this vacuum transfer switch. I have two hoses that are separate from the main connector that plugs into the control switch and I have no idea where they go. One has a white stripe and the other a green stripe. If anyone can tell me where this switch is located or provide a picture that would be awesome .

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