I have a 1976 XS500 that I can't get to spark, I put new battery and new plugs! This fuse box(left pic) is confusing that is in it, so I bought a used one out of salvage yard(right picture)! Does this have to be hooked up with all fuses good for this to get spark? I can't find any info on this! The one on right is out of a 750XS which they said would work!