Changing the motion controller in hand tracking

Hi！ anyone know how I can use to make the MotionController change based on the position of my fingertips? I find that when I pick up an object in this example, it changes based on the wrist, and the range for determining if it can be picked up is also based on the wrist, and I would like to adjust it to be the tip of my index finger so that I can minimize my wrist from accidentally touching other objects, and now, it's very easy for me to get the object that is closer to my wrist than the object that is closer to my finger, and I would like to change it.I'm assuming it has something to do with the Motion controller, is anyone clear on how to change it? Thanks a lot!