If you want really good wires and terminals, BatteryCableUSA has what you need.
Quality Copper Battery Cables Made in the USA! - BatteryCablesUSA
The battery terminals are first rate. I used the military grade terminals with side studs for connecting wires. The restoration shop built power and ground wires for a 80A alternator. The alternator power does run partly through the firewall so the ammeter shows some charging, but the bulk of the power runs through a 10Gauge wire with fusible link directly to the battery. Other than the cheap Chinese alternator from O'Reilly which I want to replace, all works well.