Pinout bottom pads

J Tech

Hi all,

I am making a pinout for the pads on the bottom, hoping to find some extra pins we can use.

Bottom pads

There are 2rows x 25 pads = 50 pads on the bottom (See blue text on image).
The headers + SD Card expose 2x16 + 8 = 40 pins.
So we have 10 extra pins to discover.

I already found a lot, but still missing some, I am hoping someone (maybe onion themselves) could help me identify the missing pins.

I made a sheet here:

Bottom Pinout scheme