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It will work but........the Festo Quick couplings work much better than the Vario fuel port for Jet fuel. They allow better flow (you will be fuelling for days with the Vario one ), lock in place and give a clean disconnect with no leaks. The Festo couplings can also handle gas and are available in different sizes so you can't confuse the two on the model...
You could hide the couplers behind a cargo or access panel without too much trouble and still have a scale fuel fitting on the outside of the fuselage.