Bonjour je voudrais savoir sur ma delta ou je pourrais positionner le capteur du chameleon en sachant que tout en haut j'ai les endstop

You can place it on a mount near the top of the effector and use one of the side rails to trigger it. The switch is located near the hot end and you use one of the legs to press the button. Optionally, you can use a digital i/o pin and the M42 command to trigger it.