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Kinect 2
Hardware
Kinect 4 Windows 2 comes with a breakout box which basically converts from a custom power supply plug with 12V and 5V & a standard USB3 B-style socket to the proprietary Kinect connector. Currently, it seems like the Kinect 4 Windows 2 itself is identical to the Kinect One from the Xbox.
PCB top view with Kinect socket + debug connector
Kinect socket with pin numbers
Pinout & Kinect cable wire colors (as per https://i.cloudup.com/gsEOYAqIDS.png):
1: 5V (from PSU), red
2: D+ (USB2), green
3: D- (USB2), white
4: GND
5: 12V (from PSU), brown
6: GND
7: GND
8: Unknown (probably debug signal), white/black
9: StdA_SSRX+ (USB3), orange
10: StdA_SSRX- (USB3), purple
11: GND
12: StdA_SSTX+ (USB3), yellow
13: StdA_SSTX- (USB3), blue
All grounds/shielding are connected internally.