I'm new here and as well to sff builds. Hope you could still consider helping a newb.
I bought an internal IR "receiver", which also allows for rerouting of the power button cable/header so it can turned on off properly via IR.
Now my issue lies with (atleast for me) unusual size of...
hope I'm not too late and can help a little bit.
(from top to bottom, and left to right)
1. circle, is afaik UART.
2. 1st arrow is speaker
3. 2nd arrow is CI1 (Chassis Instrusion)
4. 3rd arrow is CMOS
1. 1st circle to the left, sorry no idea ( have wondered about...