First CC is driven by a connector from Duik, it works like joysticks and sliders.
Second CC is linked on the first for X and Y rotation. So it has the same movement. For opening jaw, I add the value of a null rotation in Y.
It works if the head is in front view. But if I turn the head, jaw doesn't work. I think it comes from the rotation order of the CC sphere. I think I must use the Z rotation to compensate but I don't know how.