Parts such as the Taillight: Bolt,hex.5x25, Bulb,taillight, Pkg,taillight Len, Screw,tapp,4x40 are included in the Xrv750 Africa Twin 1992 (n) Germany Taillight parts fiche.
In this schematic the "Collar,t/light" is used most often.
The Taillight is made up of components including this Unit Tail Light which is the most expensive.