i dont think one comes in the box.
as for the cables - composite video is a single cable connection which is lower quality. the audio is carried in 2 other connectors making 3 in total. this is the most common kind and most pc's output this signal.
component cables split the video signal into 3 parts and is much better quality, however not a lot of devices support this input, and as before the audio is carried by a further 2 connectors making a grand total of 5.