On the right rear corner by the tail light and the bed pivot on the fram is a small bundle of wires that are grouped up.
Take off the protective boot and you will find the reverse light trigger.
I believe it is a ground trigger. Not sure of the exact color, but make sure you use a relay, as it will burn out the reverse switch on the transmission because it is not heavy enough to run a very big load.
2010 LE Camo
27" Mudlite XTR's
Yoshi full exhaust
MSD - Hunterworks curve
Black Rhino dash pnl, carbon fiber volt & temp guages, marine switches
Six 4" HIDs
Warn winch mt bumper, RT40 winch
SuperATV rear bumper, bed rails
Kolpin Rr windshield, ovrhd gun mt, dbl gun mt, cntr console
SSVWorks Upper/Lower speaker pods, ipod adapter/vol control
JBL Marine Amp
4 Kicker 6 1/2" Marine separates
Optima D34M Blue Top
Custom fuse/ground/relay/pwr dist panel