so we can help you without a lot of wasted time and misunderstanding. Good photos (a cellphone camera is fine.) can help greatly to explain things so please get comfortable with taking - and posting - them. and you'll need to FREELY provide information about what's going on and where you are with your machines. I'm not trying to be rude or hard to get along with but you are the only eyes we have here. I'm going to be bluntly honest with you here. I have a XT60 connector that powers either the laser or the esc, and two 3 pin servo connectors, with opposite pins connected so that only the specific tool with the correct end fits, either the laser signal or the esc signal. To use my laser, which is 0-5v instead of pwm, do the same except use M280 P0 S60 - Set the esc (60 for me gets me around 7000rpm which works well for me) M42 P4 S255 - Enable the relay to provide power to the esc M106 P0 255 - Enable the ground pin on the heated bed For the power wires, I had to actually run a relay, as turning off the heated bed just shuts off the ground, and the ground from the speed control pin completes the circuit, so I connect the ground direct to the ground pin on the heated bed power out, and run the positive through a relay, which I control with pin d4.
I have D6 as my laser signal, D11 as my esc signal and have a ground wire I run to both d6 and d11 grounds, and share depending on which mod I'm using.
You have to go into the firmware and enable the servo controls.
I power on and set the motor speed via gcode. I use these to power either the laser, or the esc, and use the servo pins to power the esc and the laser controller. I ran a few extra cables to the servo pins, and extra wires to the heated bed power output.