Remote battery mount

Just a few general questions regarding relocating the battery to the trunk. The car is pretty much a fun/track car. But yet Its not a full flegded racer, (am not gutting it too much) I woulld like to move some of the weight off the front wheels to the rear, ao I’ll be relocating my battery, and just have a few questions;

Do you need an external switch to kill the power? What type of box have you used? Did the box need to be SCCA or NHRA approved at all for auto-x or the local 1/4 mile tracks?
Any tips on this would be sweet!