Home the printer and select a print head - if you've already done an offset calibration then use one of the print heads other than the first one, as then you can re-check the calibration for just that one. (Remember, offsets are relative to the first print head).

Use the Mainsail web interface or the touch screen to move the print head to roughly the centre and lower the print bed. Unscrew the nozzle and fix in its place the S2DW board using the included hardware.

M6 Bolt

Rubber Washer x2

Tighten enough so that the board is not loose - do not over tighten.

Orientate the board so that the USB C port is facing down and to the left, as shown.