Put the fill dot/fitting anywhere you like. If it is on a klunk for draining the tank you might want to place it higher than the tank fill level if possible. Not usually a problem - but if you forget to leave it plugged it can dump fuel on the ground. This one has gas just ahead of the smoke fill and the vents down below. Works great.




This one is on a block behind the muffler. Clean, but watch your piddies.




I installed this one below the cowl (along with the kill switch and the vent) and it's kind of a pain. Has a servo kill switch inside as well. Again, clean, but at a price. I splii a bit but at least it's not on the model.