B34 earthing screen point.

[Smeaks]

Do 2002 era Bavaria wiring systems use an earthing point or are earthing screens brought back to the battery negative terminal?

[SYJetzt]

Usually all Bavarias have a main negative bus bar where all negative terminals are connected ( in my case B46 behind the switch-panel). This bus bar  is connected with a copper cable (95mm2) to the negative battery terminal.
Earthing screens should be wired according to the installation manual of the corresponding device.