March with auto box has an inhibitor switch that cuts the power to the starter if its not in P or N, the wires a very thick as the power goes through them instead of having a relay, just wire them together to bypass it, but on a manual box i dont see how i could affect the engine starting...
Do you want me to take some pics of the March wiring? Im still instaling the wiring on a SuperS, so not really hidden atm...