I have my batteries (4 and a charger) mounted under the storage
area between the forward bunks.
Just tall enough and big enough for everything.
Then I ran long cables to the aft cabin
, through a cutoff switch.
Then aft to the motor
Sounds like a lot of cable, but you need to get power to the aft cabin.
And then it"s just a short run to the motor
Could put batteries under the aft bunk storage
, but I have a big gas tank under there.
Even then you would have to run cables to the forward cabin.