Usually, the vacuum operated wiper motor connects to that fitting on the intake manifold. I see in your picture that another hose is hanging loose and unconnected. Follow both hoses back to the other end and let us know what you find.
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Last edited by HandyAndy; 01/04/2020 1:50 PM. Reason: Original Photo Added
Andy

His: 1947 Chevrolet 3104
Hers: 2008 American Saddlebred

"I proudly Stand for the Flag and Kneel for the Cross" Unknown