After not being able to find it anywhere, I took out the trusty multi-meter and went to work.

Here are the results:

I started with testing the connections from the USB to the Kinect adapter, that proved difficult because they actually grounded the outer ground shielding and my probe are apparently rarely fat. So the likely choice was to first find the grounds which was easy enough. Then I put one line to ground in the USB connector and traced which pin was ground that normally was not in the Kinect adapter. The 5V line from the USB was not found but the notched half of the Kinect is pinned like USB otherwise, replacing the VCC line with 12V. Obviously without having a pinout for reference I made up the numbering system so I matched the 4 that closely matched USB to their normal number scheme and proceeded with the bottom row with a coin flip whether to wrap the number or not, FYI tails won.

The fun part was plugging the power supply in and not frying it with my probes by make a short to the ground shield, but I succeeded. 12V came out of pins 1 & 5 and still nothing out of pin 8. I continued to check for possible resistive load between pins but got nothing, it seems to be not connected.

*Update*
Had the Device/Male numbers flipped on the image that was upload and the mysterious skinny pin was found and pinned out. Looking back on the photos I have, I found the extra pin in 1 out of 8 shots but it’s clear in that one. Thanks to bojer on the IRC channel for hacking into his Kinect cable, 5 wires = 9 pins doubling up 12v for amperage and 3.5(no-one really uses the shield but it’s connected) for ground. Of course Microsoft left it with an extra pin, maybe the new Slim will use it for other hardware

Kinect Pinout

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