On this parts fiche the Protector(170x95x3.0) is the most specified component.
The twelve Ls650 Boulevard S40 2006 (k6) Usa Californi Canada (e03 E33 E28) Battery component parts are all listed in this schematic.
A sample from the products for the Battery include: Clamp(l:45), Protector(50x50x5), Protector(50x50x5), Protector(170x95x3.0).