Henry Hefner wrote:

Ok, guys, it's the rookie boat owner. I'm replacing the bottom flotation
foam and floor in the old boat I bought, and thinking I need to check
wiring while it's all apart. There are no fuse.
snipped

I agree with everything that has been said. I would advise you to put
the fuses or breakers as close to the battery as possible. Preferably
right at the battery.