...Hi Guys...
I use the 4 circuit fuse holder that you can buy in a car accessories shop for around a fiver...
I wire all the positive leads from each motor, bow thruster, winch etc through the fuse box which is positioned in a handy place for fitting the fuses...
When travelling to a show or just for a sail all the fuses are removed so that all the circuits are dead.
To switch the power on...All I do is put the fuses in & away you go...When finished, Remove fuses..
This way there is no power leakage from the batteries during storage...
...Best Regards...Norry...