Doing this will allow you to:
start the motor with the side stand down
and keep it running while it's down.
If you make a lot of stops along your ride, you've probably found that getting on and off your scooter, and restarting it is annoying. Then this fix maybe worth considering.
Thank you to prohomevideos (shown on his beautiful Red 2016 model):

Honda installed the switch as a Safety Feature. If someone were to pull the throttle while the bike was sitting idling, off it would Go. NOT a pretty sight. Someone may get hurt, and badly. Think about that.