Support to hold the ender-3 laser and remove it easily.
https://youtu.be/1oyUh8zMWbE

Try to first put the lower part of the piece under the extruder block. And after, adjust the top of the piece to hear a "clic".

I've also installed a "rapid change" cable to switch between Ender fan and laser.
https://youtu.be/oL07Cy4jlF8