How to import KNMI-Harmonie forecast grids?

<regular locationId="KNMI-HARMONIE">
  <rows>389</rows>
  <columns>389</columns>
  <lambertConformalConic>
    <originLatitude>50.0</originLatitude>
    <originLongitude>7.0</originLongitude>
    <firstStandardParallelLatitude>50.0</firstStandardParallelLatitude>
    <secondStandardParallelLatitude>50.0</secondStandardParallelLatitude>
  </lambertConformalConic>
  <gridCorners>
    <geoDatum>WGS 1984</geoDatum>
    <upperLeft>
      <x>-0.45903648951570125</x>
      <y>54.150839965402184</y>
      <z>0.0</z>
    </upperLeft>
    <lowerRight>
      <x>13.221022986551972</x>
      <y>45.449937072465914</y>
      <z>0.0</z>
    </lowerRight>
  </gridCorners>
</regular>

<import>
  <general>
    <importType>grib</importType>
    <folder>$IMPORT_FOLDER_KNMI-HARMONIE$</folder>
    <idMapId>IdImportHARMONIE</idMapId>
    <unitConversionsId>ImportUnitConversions</unitConversionsId>
    <importTimeZone>
      <timeZoneOffset>+00:00</timeZoneOffset>
    </importTimeZone>
  </general>
  <timeSeriesSet>
    <moduleInstanceId>KNMI_Import_HARMONIE</moduleInstanceId>
    <valueType>grid</valueType>
    <parameterId>Temperature</parameterId>
    <locationId>KNMI-HARMONIE</locationId>
    <timeSeriesType>external forecasting</timeSeriesType>
    <timeStep unit="hour"/>
    <readWriteMode>add originals</readWriteMode>
    <synchLevel>6</synchLevel>
  </timeSeriesSet>
  ...
</import>

<idMap version="1.1" xmlns="http://www.wldelft.nl/fews" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.wldelft.nl/fews http://fews.wldelft.nl/schemas/version1.0/idMap.xsd">
  <parameter internal="Temperature" external="11" externalQualifier="2.0"/>
  <parameter internal="Wind.u" external="33" externalQualifier="10.0"/>
  <parameter internal="Wind.v" external="34" externalQualifier="10.0"/>
  <parameter internal="Precip.m" external="61"/>
  <parameter internal="Pressure.msl" external="1" externalEnsembleMemberIndex="0"/>
</idMap>