Parts such as the Battery Tray: Tray Comp,battery, Bolt Flang 6x12, Battery,ytr4a-bs, Band,b2 Battery are included in the Z50js Monkey Japan Battery Tray parts fiche.
The component with the lowest price in the BATTERY TRAY schematic is the Bolt Flang 6x12.
On this parts fiche the Bolt Flang 6x12 is the most specified component.