The Control Unit (engine Room) is made up of components including this Box Assy,main Fus which is the most expensive.
On this parts fiche the Screw Wash M5x12 is the most specified component.
Some items from this specific schematic: Screw Wash M5x12, Bolt La(for Relay Bo, Fuse 30a (block), Screw Wash (m5x12.