Posting this here first, rather than "elsewhere" - again.
The Red and Red/White wires are heavier gauge as they are the "power" wiring -
Red - this leads from the solenoid connector to the Ignition Switch.
Red/White - this is the power (charging) feed from the Reg/Rec.
These two wires are connected together within the solenoid and connect to one end of the 30 Amp fuse. The other end of the fuse leads to battery +Ve.
The two smaller gauge wires - Yellow/Red and Green Red - actually operate the solenoid's coil when the Start button is operated.
Yellow/Red - this leads from the Start Switch.
Green/Red - this leads to the Clutch, Side-stand and Neutral Switches.