MakerGear M2 rear cable harness guide

I used to have the cable harness on my M2 cable-tied to the outside of the printer's frame on the right side. However, when I installed the dual extruder upgrade, I quickly discovered that the wire harness interfered with the filament spools, which were also on the right side. So I moved the wire harness to the inside of the frame. There, though, it has barely enough room and brushes up against the heated bed bracket. So I designed a channel for the cable harness that puts the cables behind