I just installed an Injen short ram and I installed the hotwires too. I placed those brackets on top of the transmission bolts just fine. If you have to relocate your stock coils, try mounting it where your stock resonator went. It's near the radiator. That would offer easy access to them is you needed to switch.

Just so you know, honestly those wires are great and REALLY DO increase gas mileage a bit. I noticed better throttle response too.