Some stocker guys put a master switch up front to shut the front battery off as well. 9.99 or quicker requires a shut off in the back, regardless where the battery is. The switch doesn't have to be back there. The shut off does so everyone knows where to look for it. It can operate the actual switch with a cable. Master switch is a safety device. I wouldn't have a race car without it. Especially with a lithium battery. I want everything off when the car is not being raced.

Not sure why a battery up front is any better than a battery in the rear with appropriate cables running up front to a set of terminals, studs or pass throughs.