Termination dust is what falls in the higher foothills reminding us that summer is over and winter is here. We don't really have much of a spring or fall
On my 94 I went directly from the battery to that distribution block with a 4 gauge wire. Battery voltage gauge is much more accurate now too. No fusible link either
On a 92 there should be a wire that goes from the battery to the starter and then up to a power distribution block on the firewall kinda above the starter. I'd be checking that out.