Canon SELPHY DS810 Service Manual page 22

Access Panel / Access Panel Shield Plate removal
1) Remove the two screws from the upper portion of the access panel with the access panel cover closed.
2) With the access panel cover open, remove the two screws from the shield plate which is located behind the access panel.
3) Removing the hanging springs, detatch the access panel shield plate.
4) Remove the panel cable unit from the connector first, and from the access panel next.