I decided to add light to my ESS because I have one of the first revisions, where it is simply terrible. 

1. So, to begin with, we need to melt 3 brass bushings under the m3 screw.
2. Next, screw on the base for the 24V LED strip. Then glue the strip itself.
3. Next, pass the cable through the center and connect it to the corresponding pin.

PS: I use modified OPEN CENTAURI firmware, which already unlocks control of this pin https://docs.opencentauri.cc/machine/mainboard/. If you have stock firmware from ELEGOO, use their wiki https://wiki.elegoo.com/Centauri-carbon/how-to-replace-the-old-type-of-top-frame-with-a-new-one starting with “Check the firmware version.” 

PPS.: I am adding the Fusion 360 file in case anyone wants to refine this model.