IIRC doesnt the alternator positive post run straight to the fuse box? then from battery to fuse box? I am almost positive thats the routing. so what is the point in upgrading the wire direct from alternator to battery with a fuse if you arent going to do the other 2? or 3 for that matter, since a wire also runs right to the starter off the battery? I guess i dont fully understand the point, unless like previously stated, you have a HO Alt and then its def required. all i see is that youre charging the battery from the same location in 2 diff directions, and if thats the case, you need to use the same size fuse thats in the fuse box. can someone please provide me with input on this? only thing i can think of, when upgrading to a bigger wire, since the same amperage would be running through it, is that voltage drop would be reduced since the circ mils of the wire is larger.