RE: REMOTE FUEL FILL VALVE
No there are no connections inside the cowl, The rear line goes inside the cowl and back to the fuel tank the forward line goes inside the cowl and to the carburator or remote needle valve. the connection is in the middle of the external loop.
Look agine at the picture of the blue corsair with the fuel pump connected that fuel pump is pumping fuel directly into the fuel tank. That is also where its connected (very easily) when defueling. When that fuel pump line is removed the little piece of tube in the forward line is reconnected to the rear line and that exposed loop stays outside the cowl.
Also this exposed loop provides a place to pinch the line when the engine is running. If there is nowhere to pinch the line then you cannot tune to the pinch something that can be most important when using two stroke glow engines, If one cares to learn the technique.
John