Plug it into the input. Usually there would be one meant for the PC Input. VGA + RCA. Output is usually meant for connecting to your Amplifier to give more umph to the sound

Anyway , I went to ACE Hardware today (At Mutiara Damansara) , got myself the RCA Splitter for ASTRO (so that I can hook up my TV and my PC Together. Before this , it was in Mono (oh god...lol the sound quality sucked a lot..I mean a lot , but now its much more better) . Bought the Tosh link cable for Digital out. Voila its now in Digital !

Oh yeah , was torn down between VGA and HDMI today. With VGA I get no overscans (sorry peeps , I don't have full HD TV ,and I do know with full HD you can disable overscans) , its pixel prefect but again the colour quality sucks and I can't play any 1080 stuff, the pc just creeps out as the max resolution for VGA is 1366x768 (what a weird resolution , I mean its not even a multiple of 8). Connected it via HDMI , yeah the stupid TV does overscan. I am forced to choose 1080i and then downscale it to 1366x768 (its not pixel prefect but it's pretty good and I can watch HD Movies with my PC). Some may suggest me to use 720p and then set the resolution to 1366x768 , but then it sucks as pixels are being streched. I rather choose 1080i and the downscale it.

Just a tip for those who are using HD Ready TV. If you're using Full HD/1080p , just disable overscan and your PC can output 1080p pixel prefect , your desktop would look stunning. Anyway it looks stunning for me (minus the blurry font)