Ok. Now I understand better. So here what is I understand: (see my drawing)
You put a 3/4 copper into the loom to extend his diameter. You put the X-axis stepper and end stop into the loom and only then you cut the loom. The measurement will be about 860mm.
You do the same thing with the heater, thermistor, fan and extruder motor cable. The measurement will be about 440mm.
Of course you put a shrink wraps at the ends.
So there will be two sections of loom. One for the X-axis stepper and end stop and **
one for the heater, thermistor, fan and extruder motor cable.
You insert it Inside the cable chain of the extruder and you plug everything.
Little question here: There is as you call 2 sections for the loom. Lets call it 2 looms. I'm a visual person.
Those 2 looms goes Inside the cable chain?