I went with some rather large drag chain, but I am able to fit quad shielded VFD wire, coolant lines, stepper motor wires, separate grounding wire and USB cable inside it.
In that thread, there are other large drag chains worth looking at from other owners if the one I have is not what you are looking for. Also, I designed and 3D printed custom supports for my drag chain for my SO3 XXL. They are available on my Google Drive if you are interested.