Wiring up composite out to Rev C

[Cllinw]

So, I have a Rev C mobo that I'd like to starting running tests with, but I don't want to wire it up fully to my screen. Is there any way I could just solder the male jack of a composite cable to it so I can plug it into my display? If someone could provide me a picture showing where to wire what that would be awesome. Ashen's guide to the Rev C mobo just confuses me so if I missed something in that just point out me if necessary. Sorry if this is a stupid question, I'm a noob at all of this.

Thanks in advance.

 

[Fluxedo]

It doesn't get much simpler than ashens diagram. Put a wire on pin 9 of the AV chip to wire that corresponds to the jack and wire the ground of the Jack to any ground on the GameCube.