Nikon usb connector_connectors

The first order of business is to open the camera-end of the Nikon-supplied camera-to-USB cable. The outer plastic shell (cover) of the connector is separate from the inner connector and wire so it is possible to cut open the cover by carefully slicing along one side. (see the picture at the top of this page)
Once the slice is complete, the outer plastic cover can be removed revealing what appears to be injected plastic covering the wires and the solder tags of the connector. This inner plastic layer has to be carefully removed.

How to make a dual USB and serial cable from the Nikon Coolpix E990 USB cable: [Via][Link]