Fuel tank vent question

Let me begin with the first picture of the filler neck vent tube, all looks right here.


And the vent tube exits through the rubber seal in the trunk, the open end appears to be within the frame rail



Now looking at the gas tank itself, there is a fitting near the top of the tank that is blocked with a short section of hose. Should this connect to the vent tube or do you think the gas tank has been replaced with one from a later model.