hello! On my heads up display in the mission planner flight data screen, my voltage will read 0 whilst my amps will read my lipo voltage. Any ideas?

Hello new here! I am in the process of setting up my apm 2.8 and have tried to setup the radio telementry. But my issue is I have no idea what connectors go where for it other that the only wire that goes into the telementry slot on the board.I have…