With the case and battery removed from the midframe, begin removing all cables attached to the motherboard.

Place the device so the midframe's backside faces up. Start with the cable on the bottom left corner.

Use a spudger to lift up the white locking cable tensioner and slide the flex cable out.

Proceed counterclockwise to the next cable and repeat. Small flex cable on the bottom won't need cable tensioner lifted, just carefully pull out.