912 Flydat wiring

I am installing a used 2010 Rotax 912 in my Kitfox from another aircraft. The old instrument panel had 3 fault lights. One each labeled (Fuel reserve) (Charge Control) and (Control Flydat). I am trying to understand how these are wired. Is there an electrical wiring diagram for this? The old aircraft had a test push button to test the lights and it looks looks like the test button was wired to all three fault lights on the ground (-) side of the “Fuel Reserve”, “Charge Control” and “Control Flydat”. I understand how I need to wire the fuel reserve but not sure on how the (Control Flydat) and (Charge control) work by controlling the ground side? Does Rotax have a wire diagram for the Flydat fault lights and wiring?