Also posting in the communications and electronics section will get you good responses.
The kit will come with instructions and pictures. Use the relay and wire it from your battery.
'03 TJ Sport
/ D30/Ford9 / 35x12.5x15 KM2 / D window black steel 15x8 wheels / 3" custom long arm lift / SYE & 1350 DS / JKS BL / 1" MML / Smittybilt's front bumper, Tube fenders, Rocker guards, and rear bumper / High Rock Tire Carrier