Dell Studio 1558 (Early 2010) - Manual (Page 231)

Connecting Your Computer to a TV and Adjusting Display Settings
231
2 Plug one end of the composite video cable into the composite video-
output connector on the composite video adapter.
3 Plug the other end of the composite video cable into the composite video-
input connector on the TV.
4 Plug the single-connector end of the audio cable into the headphone
connector on the computer.
5 Plug the two RCA connectors on the other end of the audio cable into the
audio input connectors on your TV or other audio device.