Right side handlebar switch with STARTER BUTTON plus ENGINE KILL button. This is a very high quality unit which measures 25mm wide and fits standard sized 7/8" bars.
The RED button on top is your RUN/OFF switch, it is fixed in either position. The black button on the bottom is your momentary starter button - press and hold it as long as it takes, release to disengage.
The pigtail is 600mm long to the included mystery plug. There is no wire diagram so a bit of forehead scratching will be in order to figure out which wire does what. When we have time we will do this and add the info here. Can't be that difficult as there are 4 wires in the plug for the 2 switches plus a ground wire outside the plug.
A note from a satisfied customer: "I agree with your site description of the start/kill switch. It is a high-quality piece. The connector plugged directly into the stock wiring harness on my wife's Moto Guzzi V65SP (1984). The length was even adequate to reach from the handlebar to under the tank where the connector is. This is the only Guzzi I have worked on so I have no idea if this connector is common across models. The stock start switch was unreliable, impossible to disassemble and clean, and really poor quality. With the Tomaselli (Daytona 2C) throttle and this switch I suspect we are set for the life of the bike."