idiotec might be right, I'm having trouble understanding what you mean. The video card plugs into the AGP slot, then a regular old 4 pin power connector connects into the back of the video card. That is all you need to do with the video card. There are extra cables that come with it but only to convert to different types of plugs. I don't think you need any of those converters. The one that breaks off into 3 things is probably your S-video cable, that is used for hooking your card to a TV, nothing to do with the motherboard.
To summarize, stick video card in AGP slot, tighten in place, connect 4 pin power connector from the power supply to the video card.
That should be it. You don't need to worry about any other connectors because odds are you will have no use whatsoever for them.
Hope that clears things up. I know you are a beginner at this stuff so just remember that not every single cable and connector you get do you have to find a place for, only that ones you need.