The wiring from the EMS to the Sensor are Red, Black and Yellow. The wires on the Sensor are Red, Black and White. Which ones go to which ones. I see two possibilities.
You are correct Werner, the Red and Black match the EMS wires and the White from the Sensor goes to the Yellow on the EMS. The Red should have 14v from the EMS to power the F/F Sensor and the Black is Ground. Yellow is receiving the F/F signal.