The top fitting is usually the one that will be the fuel feed. It has a tube inside that will go down inside the tank to just above the bottom of the inside of the tank.
Be sure to put an inline filter between the tank and the fuel-pump so it will stop crud from plugging the pump and carb. Carry a duplicate spare filter with you


There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
-
-
Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!