Miele SO 2822 Series Operating Instructions Manual page 57

 Push the accessories holder onto the
wall bracket as far as it will go.
Connecting the wall bracket
 Slide the wall bracket down into the
mounting plate from above until it
audibly clicks into place.
 Slide the PowerUnit of the fully
assembled vacuum cleaner, with the
battery inserted, down into the wall
bracket from above.
 Plug the charger into the power
socket.
The charging process will start.
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