Output:
very likely non at all.
The manual connector seems to be just inputs.
So I fear no way to connect moving indicator lights except solder some wires to the LEDs on the board.
Control: you need to:
a) enable the driver channel you what to move (x EMPOWE[R])
b) select the wanted direction (x DIR)
c) clock in pulses for stepping (x STEP)
SPIND is the spindle relay ... and so on.
Not exactly rocket science when you translate the pin names.
But actually for manual control you better use the control program on the PC.
Every movement via manual control is invisible for the controller program.
It apeares like lost steps to it.
It become critical if you could select some manual input during execution of a milling program by the PC. That throws the program completely off track and trashes your workpiece. You better have then a master switch that disables the manual control safely while on automatic control.
Manual control ist just usefull for moving the machine when the PC (or the controller program) is off.
I don't need no stinking manual mode on my maschine