I have a Mini Kota trolling motor 30 thrust, not sure if that thing comes
with Fuse. Do I have to cut the +ve red cable and add a fuse? How many Amp
do I need?

The package comes with 2 terminals +ve and -ve rings which clamp to the
battery, so the manufacture doesn't assume people to add fuse? Will the
deep cycle battery blow up when overheat due to short circuit?

N.S.