This was originally published on printables by somebody else but it is no longer available and I am unable to link to the original creator.

The risers sit where the top cover sits, and the top cover fits perfectly onto the risers so it can still be used. The LED strips attach to the bottom of the riser that is visible from the inside.

You will need to print 2 of each .stl file; they fit together to form a rectangle. You may need to sand/adjust the size of the connectors depending on the filament/printer settings you're using. I used the PLA Rapido that came with my machine. Once I got them to fit together I glued them together before placing the LED lights on them.

I used COB LED lighting, strip connectors, wire connectors, and JST plug connectors to make it all work. I cut the wires for the original lighting and re-routed them to the LED lights so that they turn on/off when the case lighting is turned on/off.