Locate the rubber contact points.

Solder the rubber contact points, while using the spudger to pry the PCB loose.

PCB stands for Printed Circuit Board.

Toxic gasses might be created. Hence, do this in a well ventilated room.

Start with the lower plugs (left on the photo). Gently pry the PCB loose at the same time.

For this step a third person is required for safety. One person uses the solder iron, the other one uses the spudger to pry the PCB loose.

If you don't have accessibility to a solder iron, use a utility knife to remove the plugs.