HP ProOne 400 G1 Maintenance & Service Manual page 46

4.
Foot covers are stored on the inside of the rear cover.
After you remove the stand, install the covers in the stand mount gaps.
NOTE:
5.
If you need to replace the rear cover with the stand removed (to prepare the computer for VESA
mounting), set the top edge of the rear cover down on the top edge of the computer chassis (1).
Be sure to align the hooks on the underside of the top edge of the rear cover with the top edge of
the computer.
36 Chapter 6 Removal and Replacement Procedures All-in One (AIO) Chassis
Only the left cover is shown. Be sure to install the right cover as well.