Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4917769.
Mount for "Comidox 5PCS WS2812 5050 RGB 8 LEDs Light Strip Driver Board 8 Channel Built-in Full Color-Driven Development Board Black for Arduino" I got from Amazon that measure 57mm x 10.5mm each.
V2 is for three LED modules soldered back to back. You'll need to print the bracket at a 45-degree angle to fit into the CR-6 SE bed. Mount the bracket to the bottom of the upper Y-tail with T-nuts and M3x6mm screws, then M3x4mm screws to mount the LED modules into the bracket. If a diffuser is desired, I printed the one in the picture with white PLA. I recommend it, those lights are pretty bright.
The following applies only to the V1 version:
You could omit the snap-in part if you want to use t-nuts instead, and you don't need supports if you print it that way. Otherwise you definitely need build plate supports.