I have this quick connect two-position toggle switch I want to use as a kill switch for a Zenoah G-38 on magneto. As shown, the toggle is in the "on" position. Does this switch simply plug in-line into a connection between the magneto and ground? If so, does "on" as shown mean that the connection is on (grounding the magneto), or that the connection is off and the engine can therefore run? The swith is a Gaynor, but I have no instructions on installing it and can get no info from the company or the hardware store that carries the switch.