Great minds think alike. My work is not quite as neat as yours however it works for me. Voltage sensitive relay feeds a new fusebox for various add ons. Brake controller self resetting fuse, second battery circuit breaker and DRL controller all housed behind the battery. No chance of a flat battery if some things left on. The cover keeps everything looking tidy a
Mine's a bit more spread out, but similar (though not as neat).
There's a 140A circuit breaker in front of the battery feeding the dual battery controller.
I've got one of those cheap fuse blocks on the winch relay frame (only feeding spot lights atm), and in the rear there's a 10 way fuse block (50amp maxi-fuse).
As said it isn't neat, but it gives me a lot of flexibility.
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