Starting from left to right, there are 18 connections on controller yet there's only 17 solder pad.
The 8th has no solder pad (color orange) and i don't even know why.
1) R2
2) R1
3) Triangle
4) Circle
5) X
6) Square
I don't know the 7 to 11 (red, orange, violet, brown, orange)
12)...