wagon-providers/wagon-ssh-external/src/main/resources/META-INF/plexus/components.xml

<component-set>
  <components>
    <component>
      <role>org.apache.maven.wagon.Wagon</role>
      <role-hint>scpexe</role-hint>
      <implementation>org.apache.maven.wagon.providers.sshext.ScpExternalWagon</implementation>
      <instantiation-strategy>per-lookup</instantiation-strategy>
    </component>
    <!-- TODO: maybe this should be in the API if it is a required interface? -->
    <component>
      <role>org.apache.maven.wagon.providers.sshext.SshCommandExecutor</role>
      <implementation>org.apache.maven.wagon.providers.sshext.ScpExternalWagon</implementation>
      <instantiation-strategy>per-lookup</instantiation-strategy>
    </component>
  </components>
</component-set>