No spark

The whole point is, the firewall connector cannot take the load as it is stock. That's why a LOT of them are melted. If I was gonna do one and not the other, I'd leave the amp gauge hooked up and isolate where the hot wire comes through the firewall by relocating it out of the connector right by itself.
So could I run the main wire that goes through the bulk head in a solid wire ie without the bulkhead connector and just leave the black wire alone? I don't understand the rerouting of the alternator wire to the relay. Also in the mad method the main wire circles back into itself how does that work?