Sorry 25th but being a 2015 model it should be a G2 machine.
The brake switch is on the rear brake Master cylinder that the rear brake pedal is mounted to. R/H side of bike.
Number 40 in the picture.
You can change it without having to remove the foot board.
The switch bolts through the rear brake hose, so make sure you replace both the copper washers (#46) also.
I have changed out a few and find that you really should bleed the rear brakes after you change the switch also.