I know i have posted this picture before. What you see here is Three Vac lines coming off of "intake". (Red yellow and blue) There is one off of the turbo (Green) and one off of the BOV (pink).
The Yellow one you can actually follow in the picture. It runs up to the black fill spot for the oil. That should be one line.
The Red one, is one that you had a question about. It runs to a port on the lower intake manifold. The actual metal section of it and has a bracket that bolts to the manifold that holds the line in place and where it should be. That should be the second line.
The blue one. will come off the intake where it is circled. I rons from there down under the black plastic upper intake manifold to a small four way tee. Each spot on the tee from there feeds an oil injector. This is the line that you said went to "no mans land" and the other end is hidden under alot of other things. This should be the third line.
The pink one is a line coming off of hte BOV and ties into the vac line that hooks to the breaks and the upper intake. This should be visible in the picture and be fairly simple to see and is the ONLY line that has a "T" in it to my knowledge. This hsould be the fourth line
The Green line is the line off the turbo that feeds the wastegate. it runs straight down avoiding all piping and fans and goes directly into the WG. This should be the fifth line.
There is a smaller line that feeds the INT-X but your not having an issue with that and it can be hooked in differnt locations. I have it in the stock VFAD location under the stock black upper intake right behind the Throttle body.
These are the lines coming off the intake in an esmeril setup. IF something is not matching on your setup then i believe you will have something crossed somewhere. Somone else can step in if i am mistaken but this is how my setup is plumbled.