Carefully remove the two JIS-000 screws from the encoder assembly. I recommend needle nose pliers to assist with this. Aligning the PCB notch with the screws will help with removing the screws.

CAUTION: When rotating the PCB with the screws loose, make sure the screw heads are flush against the plastic encoder assembly and not touching the PCB. If the screw heads are touching the PCB while rotating, they can bind up and risk damaging the PCB.