Hi ColinG, glad you liked the teardown!
We just took a magnet to a new iPad Mini and found the sleep sensor is about half an inch to the right of the home button on the bottom bezel:
[image|204470]
From our teardown images, it appears to be on the digitizer cable, attached to the back of the front display here:
[image|204474]
(This agrees with Jim Thorpe's [https://bu.mp/i9KRT3|findings] in opening the smart cover—thanks, Jim!)