Battery holder with 9V battery to supply the lighting of the Rally-GT odometer when it is installed in vehicles where the + pole of the vehicle battery is connected to the body (mainly in English vehicles)
A direct connection of the Rally GT lighting (delivery date before 2020) to the vehicle's on-board power supply would lead to a short circuit.
Rally-GT odometers from delivery date 2020 are designed to be more short-circuit-proof. If the lighting of these devices is connected directly to the on-board power supply, the lighting will not work.
The battery holder is attached directly to the back of the Rally-GT with self-adhesive Velcro tape.