With the screws removed the backplate will be loose and can be removed. Be careful, as it is still attached to the switch plate with ribbon cables so don't pull it.

Gently lift the switch plate from the backplate, setting them next to each other with the ribbon cables facing upwards.

Use a spudger or a clean fingernail to flip up the locking flaps of the two ZIF connectors using the widest tool possible to avoid damaging the delicate hinge pins.

This is the unlocked position.

Use tweezers or your fingers to gently pull the cable out of its socket by the pull tab.

You could damage the cable by gripping it directly.