Plug the RCA cables into the "Audio Out" ports on the back of the LG television. Make sure the colors of the RCA cables match the colors on the connection ports.
Insert the opposite end of the cables into the "Audio In" port on the speaker system.
Power on the television and the speaker system. Push the "Aux" button on the speaker system. Once the receiver detects the the connected LG, all audio from the LG TV begins to play through the speakers.