Finally we're getting somewhere! You can start to see where the potentiometer is (circled in green). This is what we're trying to get to.

Remove the single screw holding the arm to the platform screwed into the spring mechanism. You can then remove the arm attached to the potentiometer.

There should be three screws (unfortunately some may be obsecured in the image by the cable) holding the little platform to the spring mechanism.

Remove the platform. You may need to thread the pedal wires through the platform.