On the Xbox 360, where are the other 2 controller jacks, cause I found the other 2 in front?

I found the two in front by the power button, but it is capable of 4. Where are the other 2 jacks and if there arn't anymore, what do I need to make it capable of using 4On the Xbox 360, where are the other 2 controller jacks, cause I found the other 2 in front?
There is only 1 on the back. While it may be used for a controller, The purpose of it is for other peripherals such as the WiFi connector. The Xbox 360 was made with no wires in mind, so they expect you to get wireless controllers, or enough of them that you can play using all four connections on the 360. So if you have a Core System, better buy some wireless controllers. If you have a Premium or an Elite, you can by the wired ones if you like, because they, obviously, come with a wireless controller.On the Xbox 360, where are the other 2 controller jacks, cause I found the other 2 in front?
4 wireless controllers.

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