Question on MPCNC orientation and cabling

To do what you suggested and run the wires the long way, will I most likely need more wire than what came in the Primo kit?

For my machine, I needed to extend the wires. I used two of the extension cables that came with the kit to wire up the X1 motor, then I used some 4-pin wire to extend the cable for the Z stepper motor. If you didn’t want to solder the wires, you can purchase an additional extension cable from V1.

I’m guessing that there are numerous ideas for cable chains, etc. online, Thingiverse, Prusa site, etc?

There are many cable chains on Thingiverse and Printables. In addition, this topic references a parametric version of a chain. Personally, I just threw some money at the problem and purchased this chain from Amazon. I needed two of them to cover X and Y. I did something different for Z.