It seems to me that I've gone through all the relevant wiki articles (including the one above), and searched the web a lot, but couldn't find the answer. It is said that, for external file, manifest file should contain a "fileName" section.

Say, I've got a xx.xx.xx.config file that only adds a EF connection string with this content:
<configuration>
  <nodes configfile="web.config">
    <node path="/configuration/connectionStrings" action="update"  collision="overwrite">
      <add name="MyEntities" connectionString="metadata=res://*/App_Code.MyModule.MyModel.csdl|... etc etc etc" />
    </node>
  </nodes>
</configuration>

What should be the manifest part? Although the external file has been tested through XML merge in dnn installation, putting these into the manifest causes error during module install:
<component type="Config">
  <fileName="xx.xx.xx.config"/>
</component>

So what's the right syntax in this case?

Thanks!