Take the plastic opening tool and gently pry the circuit board out of the plastic tabs around the perimeter located as shown.

You must also pry the circuit board away from the battery case (picture 2).

Now gently lift up the circuit board from the right side and set it on the cloth.

Remember, when reinserting the circuit board, insert it under the left tabs at an angle then gently press the right side down. (picture 3) Also keep the serial tab out of the way.