Konmison Sfu1605 Linear Guide Rail 400mm Linear Motion Rail Cnc Linear Rail Shaft Guide with Stepper Motor Nema 23 Support

What is the travel speed for this?

I recieved the 400mm actuator, but the motor wire colors do not match your diagram. There is no yellow. Do i assume the black wire is yellow?

Where can i find a wiring diagram to correlate wire colors to a+, a-, b+, b-?

Is there any way to get it to move faster than 50mm/s?