the small female socket, that is crucial part because the it receives the GoPro main screw: pops out instantly the first piece I received, and was already detached at the second
So now I somehow managed to attach the cam on the clamp , with this thing in between but, it's more like the cam is dedicated to the clamp than the opposite, because if the need to detach the camera from the 9.Solution clamp system , the detached and very small metal part, which presence is mandatory, would get lost very easily