What do you mean by "inside cords?" There are many different kinds of cords that could be inside your computer. For example, you probably have cables for your hard drives (parallel or SATA, or perhaps even USB). You might also have cables running from the motherboard to your case fans. If you have a graphics card that requires additional power, you'd most likely have a cable going from the side of the card to the power supply unit. In addition, a number of other components such as your motherboard might also have cables routing power in from the power supply. Don't forget the cables that connect the front LED lights and power/reset switches!
So... which cable(s) are you referring to?