I need help on a 1955 Oldsmobile Super vacuum port, please help!

I have 1955 Oldsmobile Super 88 324 rocket, a vacuum port on the windshield wiper motor. I don't know where it goes, could some one help me, or give me an idea. There are two ports, one goes to the fuel pump, and I don't know where the other one would go.

If I understand you correctly I think you are talking about the exhaust port on the wiper motor and nothing goes on that......Tedd

Thank you, this helps me a lot.