Which ones were joined together?
Were the red/black and a black together as a pair of wires, if so it sounds like it had a meta alarm fitted and this pair of wire went to the Alarm active LED
The Black on the Side stand switch goes to a permanent earth and the light blue yellow goes to the Clutch switch and the ignition switch. when you turn on the ignition this earth is extended to the Ignitor.Check if one of the wires in you connector has an earth when the ignition is switch on and goes off when the ignition is switched off.
Set you meter to check for DC volts. Connect the red lead of the meter to the Battery positive, and check each wire in turn, when you get an earth you will get 12 volts. This is a permanent earth and mark it as so.
With the meter red lead still connected to the battery ,Turn the ignition one. Check the rest of the wire for and earth, when you find one hold it one and turn off the ignition switch if the meter goes to zero you have found the side stand extended earth.
Were the red/black and a black together as a pair of wires, if so it sounds like it had a meta alarm fitted and this pair of wire went to the Alarm active LED
The Black on the Side stand switch goes to a permanent earth and the light blue yellow goes to the Clutch switch and the ignition switch. when you turn on the ignition this earth is extended to the Ignitor.Check if one of the wires in you connector has an earth when the ignition is switch on and goes off when the ignition is switched off.
Set you meter to check for DC volts. Connect the red lead of the meter to the Battery positive, and check each wire in turn, when you get an earth you will get 12 volts. This is a permanent earth and mark it as so.
With the meter red lead still connected to the battery ,Turn the ignition one. Check the rest of the wire for and earth, when you find one hold it one and turn off the ignition switch if the meter goes to zero you have found the side stand extended earth.