The keyboard is now fully assembled and here are the final results.
I soldered the NES cord to the keyboard USB cable. The wires are soldered as follows:
USB ---- NES Cord
Red ---- Brown
Green -- Orange
White -- Red
Black -- Yellow
The white wire is not connected to anything so its taped off. The wires are all now taped individually with electrical tape, and then all are wrapped together. Once everything is secure,reassemble the keyboard.
With the keyboard now assembled it's time to try it out.
*********CAUTION!!!**********
Please note that if you decide to try this mod that you are on you own. Which means that if you break your computer it's your fault.
With that being said please try this on a dummy computer aka an old junker first.
With everything now plugged in and ready to go, fire up the PC. If you did it correctly you shold have power to your keyboard. The keyboard I used also has usb ports so you can hook up a mouse as well.
Please note that these pictures were taken before the keyboard was fully assembled.
And if all goes well you should be able to do this