KC 517 Backup Light Install Help

I'm purchased this kit thinking I would mount the relay next to my other KC relay under the hood. The kit came designed to install the relay in the back. I have a 2004 Rubicon and don't want to mount it inside for cosmetic reasons since there isn't much length to the wires to tap into the reverse light and power to the new lights. Anyone have a good idea on where to install the switch. It has about 6 feet of wire which will need about 3 feet of that since I installed the lights on the swing out tire carrier.