3D Printer Hot End LED

I have a dark-ish apartment so bed leveling was a challenge for me on the anterior portion of my bed due to the Ender 5's vision blocking bar. While I have met this challenge partially by getting an auto-bed-leveler, Z offset is now something that I must contend with. I created a device that can attach directly and reversibly to the chassis of my printer's Y axis and provide illumination provided by an LED supplied by AAA batteries. The battery cover screws on using two M2 screws that are at lea