What are the step-by-step installation instructions for the Modbus option board?

First, use a 2mm hex key to remove the cover and carefully slide the POD from the housing. Place the POD face down, replace the blank label, remove the back cover, and insert the option board pins into the connector. Reassemble the POD with anti-seize compound on the threads, reinstall it into the XNX housing, and then configure the board through the Information Menu by accepting the new option when prompted.