Aluminium Profile Type Router - Initial questions

[CNCRY]

The good news - I now have 4 closed loop steppers and drivers - The bad news is that means more questions:)
So the motors come with pre terminated wires - oddly a 2M motor and 3m encoder one. To extend the motor one I assume I just use CY cable ? The existing cable does not seem to be shielded.
But with most people using CY cable right from motor to cabinet, should I be cutting shorter and using a longer run of CY - or does the closed loop negate the need for shielding?
Same with the trial prox sensor I have, it's pre cabled with non shielded wire, so do people cut short and join?

Also before I ask the manufacturer - does it matter on the polarity the AC connections to the driver are - there are no marking or instructions on Phase / Neutral, assuming it won't matter ?

Ryan