Each Zero Insertion Force or ZIF connector has a latch which holds the ribbon cable in place. The camera cable (a) and the LCD display cable (b) have a latch that lifts as shown in the illustration. Use a spudger to gently lift the latch to release the cable.

The touchscreen cable (c) has a sliding latch on each side of the connector. Use a spudger to carefully slide the latch on each side as shown to release the cable.