Start with your Cyrus unit upside down, with the front panel towards you.
Remove all screws with a Torx 10 screwdriver, and remove bottom plate.
Remove all screws with a Torx 10 screwdriver, and remove bottom plate.Disconnect and swap the blue and yellow connectors (left pair).
Disconnect and swap the grey and red connectors (right pair).
Note your colours may vary, but you always swap the left and right wires.
Replace bottom plate.
Attach PSX-R umbilical cord to back of Cyrus unit, and power on both units. Check there are no flashing warning lights.