Ok once again thanks alot basher !, could i just use standard electric cable.

Like what you get on a extension lead/cable? 13 amps ?

My motors are:
Max Rated Volts / Current/ Phase: 40vdc / 4.2amp / 2 phase

Could i use the cable that i cut off these as they come with alot and my controllers will be mounted within 2-3 foot from the machine so i will have some left over?