Mavlink Message interpretation on Pixhawk end

i have a companion computer attached to my flight controller(pixhawk) on telem port which sends a mavlink message(eg: Battery Status) to the autopilot. I would like the battery status to be appearing on Mission Planner home page. I was thinking of sending the mavlink message to autopilot first and after that reading the message on the autopilot end, updating the autopilot’s battery status message to get that in Mission Planner. Is this a possible option or is there a better option available? Any support in the said matter is highly appreciable.