750F has the key on the triple tree yes? Still has the same four wires with the above mentioned color codes. Follow wiring from switch until you find the first modular connector, disconnect it. On the older round connectors, you'd connect the four pins using an X pattern, connecting each hole to it's diagonal opposite. Not sure of the arrangement of the modular plugs on later models or F models.
Red to Black at the key switch connetion gets your ignition going. Connect the other two wires to get your taillight and running lights.
best of luck
mystic_1