Now comes in two files: one for passive cooling (w/o fan, shown in photos) and one with fan. I personally use the one w/o fan since I already have a main control board fan.
Another remix of https://www.thingiverse.com/thing:1712796 to allow no drill bed rewiring. Unlike https://www.thingiverse.com/thing:2370329, this will point the wires backward instead of sideward.
I am using the part1 MPSM_Passive_Cooling_PanelSplit-_Part_1.stl from the original
This part looks also nice together with https://www.thingiverse.com/thing:1937513, we just need to mirror it so the guide hole will be nearer on the side
The rubber grommet I used has 15mm outer diameter and 8mm inside diameter. Together with the braided cable sleeve, I just bought them from a local electronics shop (Sim Lim Tower)