I have a sakura shopper s305 I believe an old shopper one. It has no throttle. Will a 6 wire one fit or is it like a powabyke where it may not work and run all the time or something. Does anyone know if one would fit or where to get one. Found this one https://www.ebay.co.uk/itm/124531914675 just not so sure. 6 wires with a battery indicator I know but not a lot more than that. Any wiring diagrams or advice? thanks