Kpaske,
when I installed mine, I disconnected the original horns and used the existing wiring to hook them up. Since there is already a relay in the factory wiring, there is no need to install an additional relay. I removed the passenger side horn and fabbed a small braket to mount both horns on the factory mount. This positioned the horns close together facing down just behind the cladding. It was a struggle to mount them there and took some acrobatics - but easier than removing the cladding - hope this helps!