In this schematic the "Bolt" is used most often.
Parts such as the Battery: Washer, Cord,battery Minus, Battery Assy (12v), Wire,battery Plus are included in the Gs450sx 1981 (x) Usa (e03) Battery parts fiche.
The most reasonably priced component used on the Gs450sx 1981 (x) Usa (e03) Battery is the Bolt.