How can I connect my Xbox 360 to my Dell XPS One?

I have an Xbox 360 and a Dell XPS One and I want to connect my 360 to it. There are no plugs to plug in your red-white-yellow cables to the back of the computer. So if I am able to, how do i do this?How can I connect my Xbox 360 to my Dell XPS One?if there is a DVI cable in the back you can go out and buy the xbox360 DVI cable for about 30$ and plug it in to the monitor and you should be good to go