Need help with my sketchy battery cable situation

spacebetty wrote:
I don't use a generator, but I do use a smart charger plugged into house power. Do you think I need a larger gauge wire for that? Also, just curious, what is the purpose of the fuse on the positive cable?

No stay with what you have is fine. The fuse would be for a short circuit. The battery could easily melt that wire and cause a fire. If no fuse currently I assume it is wrapped under all that tape or the prior owner just removed it.