Go to the printer.cfg file and activate the board by uncommenting (removing the #) in front of [include S2DW.cfg]. Save & close to finish.

Download the S2DW.cfg file from here (if not already).

Upload it to Klipper here (if not already).

Copy and paste the ID from the previous step here into the S2DW.cfg file.

Save and restart when done.

If successful you should see it pop up as second CPU here. If not double check the serial ID has been correctly copied and entered. Check the format is similar to what we've shown here in the image.