This step involve handling sensitive electronics. Avoid static discharge.

Pull up on the plastic outer barrel that covers the back of the lens (there are no screws holding this part on).

Caution, there is a ribbon cable that connects this part to the main PCB board, so be gentle when removing the outer barrel.

The two ribbon cables plugged into the brown and beige connector are locked in. You must gently lift the locking flap up before you can remove the cables.

iFixit connector guide

Gently unplug the remaining four ribbon cables from the main PCB board.

Remove the one screw holding the PCB board to the lens and set it to the side.