Miele EGW602-14 Operating And Installation Instructions page 16

The plate warmer must be installed
above a fixed interim shelf within the
cabinet to ensure that the cabinetry
can support the weight of it and of
any other appliance installed in
combination with it.
When installed in combination with
another appliance, the plate warmer
must always be installed beneath
the other appliance. A shelf between
the appliances is not necesary.
^ Trip the circuit breaker to the outlet.
^ Plug the plate warmer into the outlet.
^ Push the appliance into the cabinetry
and align it.
16
^ Open the plate warmer drawer and
use two screws to secure the plate
warmer to the side walls of the
cabinetry.