There are 5 ribbon cables connected to the motherboard. Two of these cables are clipped on and one is soldered on. Remove the 4 ribbon cables you can clip off using the plastic spudger.

For large ribbon cable use plastic spudger or your fingers to release ribbon cable clip by pulling the black edges down and pulling ribbon cable out.

For ribbon cable on the left side, flip up black hinge to remove ribbon cable

Desolder fifth ribbon cable with soldering station.

If soldering is new for you, then follow this useful guide on soldering and desoldering connections.