Backing Plate: https://www.thingiverse.com/thing:5212061

Simply print out the backing plate x2 for the 300mm, and install it into the rear of the front extrusion. Run your wires from a Spare Hot-End connection on your board, or other dedicated 24v port. Cut the LED strip to size at the proper point, and attach it to the backing plate. PROFIT! Oh, and we share some Macros we found online below for your config. One you add these macros, add the LED_PCT_PRINT to your START_PRINT macro, and LED_OFF to your END_PRINT macro and you are good to go.

NOTE: CHANGE THE PIN TO THE PIN YOU ARE USING! WE ARE USING HE1 ON OCTOPUS 1.1 (HOT-END #2)

pin: PA3
pwm: true
shutdown_value: 0
cycle_time: 0.0002


gcode:
  SET_PIN PIN=caselight VALUE=1

gcode:
  SET_PIN PIN=caselight VALUE=0.06

gcode:
  SET_PIN PIN=caselight VALUE=0.4

gcode:
  SET_PIN PIN=caselight VALUE=0