71 Porsche truck and fuel line questions

[SubZerogc]

Hello,
I am cleaning out the trunk of my 71 and noticed some issues with the fuel tank. I am assuming this clear hose is probably a breather hose that goes up into a box that is under the driver side hood. What is that box? And what hose is the one with the blue arrow and what should that be attached too? the other end I think is attached to the same box as the breather hose?
Thanks for your help!

[Zedone]

This might help-its a complicated system and those clear tubings are likely cracked somewhere by now.

[SubZerogc]

Thank You Zed! That helps a lot, is that page from an original maintainance manual? Other then the plastic tubes being dried out and brittle, should I be changing anything in the expansion chamber or charcoal container? Not even sure if I have a charcoal container.

[Zedone]

Here are some better pictures of the tubing arrangements and fittings in my 71. I had to replace one cracked clear tube with a conventional black fuel hose that went from the T fitting to the vent chamber (#2) . I got the diagram online somewhere, can't recall. If you search here there was a prolonged discussion about whether the charcoal needs to be replaced. I think not.

[Zedone]

More pics to the lines to and the expansion chamber (#1) located under the cowl.