@gloomyandy and @jay_s_uk
First of all, thanks for answering.
I don't have enough knowledge to start a challenge like this, I have no idea how it would be done lol.
Using canbus would be ideal, because I'm currently converting a machine running klipper, which has an ebb42 board in the car.
Because of the difficulty, I think I'll opt to run all the wiring for the car's accessories (without canbus).
I'm leaving klipper and converting my printers back to RRF because of the complexity of klipper (for me). I want to go back to the simplicity of RRF and not depend on an SBC running linux.
Sorry for the bad English, translated by google.