Hi,
well that looks fine. Do you have an Estop button on your control box. Does it work? If it does then Mach and the control box are talking to each other
which is good news.
Does your BoB require a charge pump signal? If you take the cover of the box can you see/get to/probe the Dir pins of the BoB or drivers?
Thinking that if you have a multimeter you could probe the Dr pins while jogging backwards and forwards.
Craig