Excellent design by rockpaperlizardspock. Thanks for sharing. The original one is good for 0.7mm (21 awg) diameter wire. I modified it to use it with 0.5mm diameter wire (24 awg). That's why you see two center pieces in pictures above.
I inserted wires in to holes and then glue the outer wires with epoxy. Then soldered them to power supply jack, and usb cable. Last I applied some glue on center piece and glued the copper connects to it. Pictures posted by me are self-explanatory. Kinect works great with this adapter. I am using spare 12V 2A iptv box power supply for kinect.