I have it fused at the battery with a 300 amp fuse for 0awg, but I also have a fused distro block for my three amps with 2 4awg and 1 8awg coming out. I have a 30, 60, and 120 fuse running to the proper amp. Would this be fine? Just not sure if I fuse for the wire or for the total fuse on each amp.