When using the Universal Zaribo Einsy Box by JuanPuchol (thing:3239428), the x-stepper cable is inserted from top of the box.
Here is my cable holder to ensure, stepper cables are held in place and won't break near the stepper itself.

Please be aware that you have to adjust the size a bit to ensure it fits the stepper.
For me, 103% worked perfectly. Use one M3 screw to mount to the front of the stepper and two small zip ties for the cable.