The first picture is the connector and the second is where on the Hydrovac it connects. It’s is the large port on the top of the picture.
Attachments
IMG_0956.jpeg (339.78 KB, 127 downloads)
IMG_0958.jpeg (255.02 KB, 127 downloads)

1954 Chevy custom 261CID, T-5 5 Speed.
1952 Chevy 6400 2 ton hydraulic flat bed.