Battery draining overnight

I’ve been reading the MadElectric article and I’m still a little confused. What I’ve been able to understand is this,
1. Disconnect everything from the ammeter.
2. Splice the two wires together that were on the ammeter.
3. Run an 8gauge wire from the alt to the starter relay. (Do I fuse this?)
4. Drill a hole in the big firewall harness plug thing where the red wire goes through.
5. Splice the red wire with fusible link into the wire it would’ve plugged into on the firewall connector.

Does this sound right? I’m trying to do this the best way possible while I’m in there because there’s nothing I hate more than wiring problems. Any input or pictures/diagrams will be greatly appreciated.