How many Electrical goooroos do we have in this post

The correct way to install a battery in the trunk is to switch the negitive side in the rear of the car.(Race Car)Potential to ground using #2copper to the Rollcage with stud welded to cage. #2 copper to Master switch in dash then to relay control. Or what ever your running for a switching system. Switching the - cuts everything off then High amp switch in dash + will controll what you want to shut off from inside of car. (Starter,Fuel,Alt,) This is just a start to a wiring madness you can create..

I run my cables in the inside of the car.