The front of the mouse is held together by plastic clips. They can be particularly stubborn and may require some force to pull apart. Apply steady, slowly increasing pressure to force the halves away from each other.

Insert a spudger into the small gap between the top and the bottom mouse case right above the charging port.

Pry open the mouse clips by tilting the spudger upwards to separate the two mouse halves.

The mouse halves are still tethered together by a delicate cable.