Dell Inspiron 545 MT User Manual page 230

3 Plug the single-connector end of the audio cable into the headphone
connector on your computer.
4 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.
Composite Video and Standard Audio
composite
video adapter
S-video TV-out
connector
NOTE:
Depending on the computer, the composite video adapter may be a single
port or multi-port dongle. See the documentation shipped with your computer.
1 Connect the composite video adapter to the S-video TV-out connector on
your computer.
230
Connecting Your Computer to a TV and Adjusting Display Settings
standard audio
connector