o register a control channel for an instance to send control messages to Systems Manager service
               </td>
               <td tabindex="-1">
                Write
               </td>
               <td tabindex="-1">
               </td>
               <td tabindex="-1">
                <p>
                 <a href="#amazonsessionmanagermessagegatewayservice-ssm_SourceInstanceARN">
                  ssm:SourceInstanceARN
                 </a>
                </p>
                <p>
            