B-g431-esc1 CAN interface

oh yeah, sorry I was thinking the other set of pads, there is a pic here B-G431B-ESC1: Beginner guide + I2C guide - hardware support - SimpleFOC Community

Which shows some more, but not those ones. If you look at the schematics of the board you can figure it out though, at least see which are v+ and ground and then the other two would be harder to figure out but you can.

there is a pdf document with the schematics of the board somewhere. If you google there is a page from ST electronics with a collection of documentation, that’s where I got the manual.