If you haven’t figured it out, here is a photo.
I had the same trouble as you. First I thought it was #2 in the photo, but when I hooked it up, there wasn’t enough vacuum pull. Looking further, I found the correct one on the backside of the motor. See second photo for an idea where it is.
Red line runs from the PVC to Can Inlet.
Blue line runs from the Can Outlet to Intake Manifold.
Its working fine. The can is notably full when I check in between oil changes. I’m at 89,000 with no symptoms of carbon.
Finding a place to install the can was a treat. Curious what you come up with. Please post.