Just my opinion - (I know the eboxes can be hard to get to in a BOB) - spend your time & effort in making sure you have a reliable setup. Then you won't have to mess with the box.
In the past three years I've had to do that exactly once.
Short of that, maybe epoxy some inserts to the sides of the bilge and bolt it there.
In the past three years I've had to do that exactly once.
Short of that, maybe epoxy some inserts to the sides of the bilge and bolt it there.