Laser to A20T. Ideas?

[sednomen]

Hi, I want to mount a laser for very occasional uses, but so that I don't have to make any modifications to the printer. Although I have already managed to make it work because the support model is not very stable (I don't know how to use autocad) and the laser is always on (external 12V ).
If someone knows what the type of connection of the plate to the extruder 0 and the one that goes to the head is called, it could get the power from there and the indication to turn the laser on and off on the move.

This is the video working:
https://photos.app.goo.gl/Cn4tKAyGf4JUKtJu7

And my tinkercad design prototype:
https://www.tinkercad.com/embed/im1AD9Z961d?editbtn=1
I try to make a support easy to print and adjust.

[Rainer2]

Hello

Did it work?
Can you pleace give me Instruktion?

Thanks