It doesn't matter too much.... You're supposed to use wireing large enough to carry the fuse rating for a short period of time (in the seconds) so you don't fry the wires in a short. REMEMBER THAT THE FUSE IS TO PROTECT THE SOURCE (battery) AND WIRES FROM FIRE. It will NOT protect the components on the circuit board(s) from short. It Takes an overload draw (like a short) on the load side to puddle the fuse. By that time, you've already crispy crittered some of the components on the board....

STILL, it is a good idea. may save your tank from turning into a flaming pile of plastic (not to mention the battery).

Splat