Take a Soldering Iron and melt the solder connecting to battery wires to the motherboard.

There are two wires, black and red.

Next, use the soldering iron to melt the connection for the speaker.

The speaker has two wires as well, red and black.

Finally, use the soldering iron to melt the connection for the antenna wire.

The antenna wire is a the single grey wire.

Once the solder is melted, pull the wires out.