I have not taken this unit off, but can anyone tell me if the fuses on this block are separate and not daisy chained, for lack of a better term? I also just realized, after 20 years of ownership

, what these fuses do in regards to a 72. The top fuse is for a sportamatic, which I don't have, the middle is the starter enrichment and the bottom is for the defrost, which I also don't have working. So, I'm speculating that the only fuse that is needed in my case is the middle one, unless one of those wires is hot and supplying current to the entire block?