Here's a photo illustrating where the 4-pin male-to-female jumper cable extension plugs into the NAZA. The A 4-pin jumper wire extension (shown in the picture with blue, lavender, gray and white wires) is required to extend the reach of the LED/USB wire mounted on the door up to the NAZA. These 4-pin wires are commonly used with Arduinos and can be purchased at low cost online.
Plug in the 4-pin LED/USB extension wire into the correct port on the NAZA
If your 4-pin extension wire fits loosely, take a small piece of electrical tape to secure to the NAZA
Take note of which colors on the 4-pin extension wire correspond to the 4 wires on the LED/USB board. If necessary, write it down, because once the Phantom shell is closed, it is not possible to see the wires and how they are plugged in. In this example, the blue wire corresponds to the red wire on the LED/USB board.
NOTE: Take note of the direction of the extension wire at the NAZA so that it is not reversed when you plug the USB/LED board in that is mounted on the battery door.
Hope this helps.