Is this the intake manifold vacuum?

Here's a couple of pictures for you to see. Notice how the large one comes out the top/middle and the smaller ones come out around it... The large one in the middle is the port for the vacuum for the brake port that mounts on the booster...

Here's one style:

View attachment Vac Ftg A01 B.jpg

View attachment Vac Ftg A01 B2.jpg

Here's another with more smaller "side ports":

View attachment Vac Ftg A03 B.jpg

View attachment Vac Ftg A03 B2.jpg