Push the three white hinges upward, gently, with your finger or a spudger. The hinges will move away from the blue tab on the cables. This will release the ribbon cables sandwiched under the hinge.

The white hinges are also attached to a black base on one side. Do not try to pry the black bases off the motherboard. This will break them.

Pull the ribbon cables away from their black bases gently with your fingers. Hold the whole cable by the end with the blue tab, but do not pull on the blue tab alone. That can rip the tab off.