New CNC Mill on the horizon

[JAZZCNC]

basically will the drive still work if these are not connected I think is a simpler way of putting this!

Yes they will work fine if not connected. Yes and No to default being Enabled. To understand better how the Enable feature works some understanding of the feature will help.
The Drive signal inputs by Default are enabled and when you use the enable feature what your actually doing is turning them off.
One of the main reasons to use the enable feature is so the Motor stays powered up. The enable signal just disables the drive inputs
and leaves motor under holding torque.

This is fine for Say limit triggers for when other axis need holding Ie Z axis and when leaving machine for any length of time when Mach is not Re-set so motors or axis can't accidentaly moved. But Not when in E-stop situation when really power should be removed from the drives.