If thats how you want to mount it cool, different but it will work. You still need to buy a kill switch and enough cable to go from your battery to the switch, battery to your ground probably under against the frame, from the switch to your starter solenoid, switch to alternator. Best route is to go to a local welding supply and buy welding cable its much easier to work with and you can buy it by the box in rolls and even by the foot.
If i did it over again i would have just bought a box, switch and then bought welding cable instead of taylors kit, it wasnt enough cable it and it sucks to work with.