Stand with detachable back.
PAX S300 attached to stand.
Feed the cable that attaches to the S300 up through the stand. To do so remove the cable from the S300 and feed it up though the pole and out the back. Then attach the cable to the unit and screw on the back attachment piece for the stand.
To attachment the mounting plate, remove the stylus holder screw. Then use the new screw that comes with the stand back to attach the stand back over the stylus holder.
To attach the S300 to the stand, push down on the release latch and place the S300, with the back attachment, on the stand and release the latch. To remove the S300 from the stand, push down on the latch and remove the S300.
If needed the serial number can be seen through the back attachment of the S300 mounting plate.