Replacement fuel tank questio

[Auston]

Hey guys. Ran into my first issue on the 71. I ordered a new spectra tank from rock auto. Everything fit great but my original tank had a fitting in the upper passenger corner whereas the new tank doesn’t. From what I found on here, that fitting is for the vapor line?? If thats correct, I’m assuming it’s no longer needed being as the new tank did not have it. Do I need to plug that off, leave it as is, or what? Thanks for the help.