Wiring a SAL S9784 selectable colour panel light into a TCI DALI Driver and choosing the colour

The driver on the SAL panel light has a switch to choose the colour and three wires from the driver to the light but the DALI driver only has two wires for the panel.
So how do you choose the colour of the panel when switching to a DALI driver?
Works out it’s switching the combination on negative wires to choose the colour.