Anycubic i3 Mega Ultrabase Cable Guide

I originally tried to use Alex100dre's cable guide for the original Anycubic i3 Mega, and discovered it doesn't fit on my later i3 Mega with Ultrabase.

I completely remodelled this from scratch to work for the later Anycubic i3 Mega with Ultrabase.

My version is slightly narrower and slightly less deep to allow it to fit. There's a larger notch in the back to clear the connector used on the later i3 Mega, and some additional support where the guide joins the base (because I accidentally sn