Dometic NDR 1402 Installation And Operating Instructions Manual page 16

Put a screwdriver into the slot of the shelf lock.
Turn the screwdriver counterclockwise.
Remove the shelf locks from the wire shelf.
Slide the wire shelf to the left.
The right-hand side of the shelf will come loose.
Lower the right-hand side of the wire shelf and
let the left-hand side slide out of the holes in the
wall.
16
Positioning of shelves
Insert the ends of the wire shelf on the left-hand
side at the desired position.
Slide the shelf into the holes on the right-hand
side.
Slide the plastic plugs into the holes of the wall.
Snap the shelf locks onto the wire shelf.