Vacuum Lines on '74 2.7

[tculling]

I cannot find where the vacuum line from the top of the vacuum control valve hooks up? There are three vacuum lines on the valve (1-bottom, 1- middle) these hook up to the throttle body. I have seen some pictures where there are three hook ups on the throttle body for the vacuum but I can only find two on the back of mine. See picture.

[Zaz]

You don’t have a pic, but here’s one of my 74.

[75 911s]

And from my 75


And another one I found here on Pelican.

[tculling]

Thanks for the pictures! I must have another connection on the back side of the throttle body - tried using a mirror. May have to remove one or both of the other lines so I can see the connection.
Thanks again,
Tom