I looks incredibly basic.
Red wire goes to ground.
There are two wires off of the stator, yellow and green. The green plugs into "verde on the black box. The yellow goes into a voltage regulator. (There are only more yellow wires off of the voltage regulator that much power everthing.)
There is a blue wire plugged into "stop" on the black box. It goes straight and uninterrupted up to the bike's kill switch. So, almost certainly, if you ground the blue wire to kill the engine.
Hope this helps!