attached is a colored diagram of the factory wiring for a 650.
yellow is headlight low beam
green is headlight high beam (dont confuse with green for right turn signal)
brown is for left turn signal
blue is running lamps
green is for right turn signal
black is ground
looks like some after market wiring was done with the red splice clamps.. so I dont know what the white after market wire might be. It would be more reliable to solder the connections and use heat shrink to seal the connection. Most big box hardware stores and Harbor Freight has the heat shrink.