Some folks like to install a BATTERY DISCONNECT SWITCH. This makes it easy to disconnect the battery when not in use. It also lowers the possibility of you hooking the battery up backwards (VERY EASY TO DO) and blowing some fuses...
Here are many views of the different battery disconnect switches
DISCONNECT SWITCHESClick on the one you like for more info..
I sort of like this idea using the disconnect switch that has a removable key - keeps the kids from playing with things... These can be mounted to the battery case lid or to the side of the battery case.
I use a more expensive Battery control switch made by BLUE SEA in my mulitple battery bank setup that has multi-positions and the contacts are sealed iside. It also makes before break reducing the chance of internal ARCING on the contacts.
Caution - If you pull the plunger out of the break-away cable unit just be aware it will be sending DC VOLTS to the electric brakes and will run down your battery pretty quick. Each electric brake Assy draws around 3 AMPS I think it is. Not good to leave the 12VDC on the electric brakes for any long length of time - might also burn out your brakes too... If it is going to take a long time reinstalling a new cable then pull the negative battery terminal to disconnect the source.
Just my thoughts
Roy Ken