Find Keypad Code - 04 Explorer Sports Trac

I just purchased an 04 Explorer Sports Trac which has only one key and nothing giving me the keycode. According to the owner's manual, the keypad code for the 04 Explorer Sports Trac is located on the "computer module". Can someone tell me where the computer module is located and where the keycode is found on the module?

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I have an 03 sport mine was under the dash board. I pulled the defroster grill up and on the it was on the passenger side I had to look from the outside back into the vehicle