Audio Problem: HDMI to TV

I have connected my MacBook Pro to my Samsung LCD TV using a MiniDisplay Port to HDMI cable and the video works great. Everything is fine with the video. However, I bought a Belkin Audio Y Cable Splitter 1-Mini Plug/2-RCA Plugs in order to get the audio from the headphone jack to come out of the TV speakers. The problem is, I don't know which Red and White ports to plug in audio cable into.
Can anyone help me set this up?
My TV is a Samsung LN32B360C5D: http://www.samsung.com/ca/consumer/detail/detail.do?group=tv&type=tv&subtype=lcd &model_cd=LN32B360C5DXZC
Here is the back of the TV--which ports should I plug the wire into?: http://images.televisioninfo.com/images/upload/Image/Reviews/Samsung/LN32B360/ca llouts/images/Samsung-LN32B360-ports1_11.jpg
Also, once I have the audio cable in the correct place, do I need to do anything with the setting on either the Mac or the TV?
Thanks!

I have a sharp aquos 42 in HDTV and have connected the video and audio cords as needed but only the video has come up there is no sound. Do you have any suggestions of what I could do?

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