Just write-up anything that you find that works, there are a lot of people out there who lack skills at doing micro-miniature soldering.
The main point of interest to our audience is 'low cost' -
since one kindle, once in a lifetime is all they are going to be doing.
(A serial port connection is required to JB all 5.6.x firmware.)
That same connector pad layout has been used on all devices, starting with the K4.
Only the location on the motherboard varies.
(On newer devices, they have left a bit more room between the pad and the resistors.)
Other pictures (and related info):
KT2:
https://www.mobileread.com/forums/sho...20&postcount=3
PW2:
https://www.mobileread.com/forums/sho...99&postcount=6