How to configure CameraInfoManager set_camera_info service name?

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How do I configure CameraInfoManager to publish the correct set_camera_info services?

I am working on a very simple node to take stereo images produced by a stereo USB camera where the images come in as a single double-wide image consisting of left/right images concatenated. The node simply splits the incoming image down the middle and republishes on left and right image topics. I am trying to add the appropriate CameraInfoManager machinery to load/save calibration data. The current code is in the branch 'cam_info' at https://github.com/dbc/side_x_side_st...

I create two pointers to CamInfoManager instances:

// Camera info managers.
camera_info_manager::CameraInfoManager *left_cinfo_;
camera_info_manager::CameraInfoManager *right_cinfo_;

Allocate and init:

    // Allocate and initialize camera info managers.
    left_cinfo_ =
        new camera_info_manager::CameraInfoManager(nh, "left_camera");
    right_cinfo_ =
        new camera_info_manager::CameraInfoManager(nh, "right_camera");
    left_cinfo_->loadCameraInfo("");
    right_cinfo_->loadCameraInfo("");

But I don't see 'left_camera' or 'right_camera' associated set_camera_info services being advertised:

dave@ai1:~/catkin_ws$ rosservice list
/cameracalibrator/get_loggers
/cameracalibrator/set_logger_level
/image_raw/compressed/set_parameters
/image_raw/compressedDepth/set_parameters
/image_raw/theora/set_parameters
/libuvc_camera/get_loggers
/libuvc_camera/set_logger_level
/libuvc_camera/set_parameters
/rosout/get_loggers
/rosout/set_logger_level
/rqt_gui_cpp_node_5296/get_loggers
/rqt_gui_cpp_node_5296/set_logger_level
/rqt_gui_py_node_5296/get_loggers
/rqt_gui_py_node_5296/set_logger_level
/set_camera_info
/side_by_side_stereo_splitter_node/get_loggers
/side_by_side_stereo_splitter_node/set_camera_info
/side_by_side_stereo_splitter_node/set_logger_level
/stereo/left/image_raw/compressed/set_parameters
/stereo/left/image_raw/compressedDepth/set_parameters
/stereo/left/image_raw/theora/set_parameters
/stereo/right/image_raw/compressed/set_parameters
/stereo/right/image_raw/compressedDepth/set_parameters
/stereo/right/image_raw/theora/set_parameters

There is /side_by_side_stereo_splitter_node/set_camera_info, but I am confused as to what is creating that.

So, I am clearly not setting up the CameraInfoManagers correctly to get the topics that camera_calibration expects. It is kind of whiney:

Traceback (most recent call last):
  File "/opt/ros/melodic/lib/python2.7/dist-packages/camera_calibration/camera_calibrator.py", line 247, in on_mouse
    if self.do_upload():
  File "/opt/ros/melodic/lib/python2.7/dist-packages/camera_calibration/camera_calibrator.py", line 207, in do_upload
    response = self.set_left_camera_info_service(info[0])
  File "/opt/ros/melodic/lib/python2.7/dist-packages/rospy/impl/tcpros_service.py", line 439, in __call__
    return self.call(*args, **kwds)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/rospy/impl/tcpros_service.py", line 499, in call
    service_uri = self._get_service_uri(request)
  File "/opt/ros/melodic/lib/python2.7/dist-packages/rospy/impl/tcpros_service.py", line 467, in _get_service_uri
    raise ServiceException("service [%s] unavailable"%self.resolved_name)
rospy.service.ServiceException: service [/left_camera/set_camera_info] unavailable

What do I need to do to get CameraInfoManager to advertise sensible services?