1973 911S Tunnel Fuel Lines

I am having a hard time determining what tunnel fuel lines are in my car.

I have taken a few pictures from different angles, and I have used the search function to look at old forum posts. The pattern of holes in the rear of my tunnel do not seem to match others I have seen. My big question is what are those two curved tubes on the far left? And which are the supply and return lines? I seem to have two fuel lines at the front and 3 (the curved ones at the far left, and a straight tube above the handbrake cable) exiting at the rear so I am confused.

Thank you in advance.

The curved tubes are for the charcoal filter evap recovery system . The straight tube is the fuel supply and the hole receives an 8mm tube for the fuel return .

Does this help?

Thank you Richy for your help. So I am indeed missing the return line. Does anyone have any information on how the charcoal evap system is hooked up?

David, thank you also. Any chance you can take the picture from a lower angle?

I have two good pictures for you but the upload function here is not working.

Here is my Euro 73S, no evap system but supply fuel is outboard and return is inboard. First pix looking from front, large supply on the right. Second pix looking up in front. Third pix from rear, u can see large supply line coming from coming from the left, going under small return line.

Among other places, like shop manual, I think the owner's manual shows a picture.

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