Dometic NDR1292-S - Manual (Page 15)

Positioning of shelves
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
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.
the plastic plugs into the holes of the wall.
the shelf locks onto the wire shelf.