Trunk Vent Tube Question

I think you'll have to cap off 3 of the 4 and run a hose off the 4th tank vent.
Would work to connect that 4th line to the hard line that goes back to the bowl vent.
But ... since that hard line was removed you'll have to run a hose that is higher than the tank. Vent could go to the fill tube but you'll have to drill a hole and add a fitting to connect the 4th hose to. You could run a hose with a loop high up in the trunk and then put a tip over vent through the trunk floor. Has to vent outside the car no matter how unless you vent to the carb bowl.

I made a change on my set up, the fuel cell vent goes to a rubber hose with a loop high up and the tip over vent valve is now mounted where the gas cap was. The fill tube was removed for now because the cell is not the quick fill NASCAR type. I could convert to that and fill the cell from the original gas cap which might be kinda handy.
Sounds confusing but if I get some pictures it's pretty simple.