Checkout also teardown from ifixit:
https://www.ifixit.com/Teardown/Kind...Teardown/32278
@blkhawk, would it be possible for you post here more details about what exact cable did you use to connect the kindle, and how did you use the KindleTools to root it?
I know that there is already huge amount of information around the forum on the topic, like here:
https://www.mobileread.com/forums/sho...d.php?t=194408
and here:
https://www.mobileread.com/forums/sho...d.php?t=170566
But I am just wondering about your approach.