code: def _setup_dest_conn(self, dest_conn_id, results_bucket_name, results_dest_name):
          
          conn = BaseHook._get_connection_from_env(dest_conn_id)
          if conn.conn_type != 's3':
              raise AttributeError(
                  "Only s3 is allowed as a results destination, not {0}".format(conn.conn_type))
  
          self.dest_conn = S3Hook(aws_conn_id=dest_conn_id)
          self.dest_conn_id = dest_conn_id
  
          if results_bucket_name is None or results_dest_name is None:
              raise AttributeError("Specify bucket name and key name to store results")
  
          self.results_bucket_name = results_bucket_name
          self.results_dest_name = results_dest_name
docs: Setup results connection. Retrieves s3 connection and makes sure we've got location details (bucket, filename)
          :param dest_conn_id:
          :param results_bucket_name:
          :param results_dest_name: