Connect USB cable to GPIO pins on an Arduino Uno
The reason you are confused about which wires go where is simply because the Uno has no connection on it for a USB cable's wires.

You cannot directly interface an Uno to a USB port without extra hardware.  What hardware you require depends on exactly what it is you think you are trying to achieve.

(There have been some attempts to create a USB device interface purely in software, but personally I wouldn't touch it with a barge pole - the GPIO of the Arduino is not electrically compatible with USB.)