Bravo on making the effort to examine in detail how the driver board is actually wired, and what design decisions (and possible mistakes) were made by some anonymous board designer on the other side of the world.

I'm considering getting a board that looks suspiciously like the one that is shown in your photos, and so I'll have to take a closer look at the TB6560 spec sheet and reference design and compare it with your reverse-engineered info. Thanks...