The EMS grounding cables of the wiring harness (labelled: "Regulator A“ or cables with cable lugs) must be connected to the 3 attachment points of the EMS ground (Regulator A). Each cable bundle of ground lines from the wiring harness has to be connected to one of the free fixing points. EMS ground has 3 interconnected ground connections which may be used interchangeably.
Airframe ground (Regulator B ) also has 3 interconnected ground connections which may be used interchangeably, one of which must be connected to the airframe ground.
Any advice?