Insert the plastic opening tool in between the shelf halves and lift the top shelf half to detach the securing tabs.
There are four securing tabs located on each long side.
Before fully separating the shell halves, observe if the speakers are separated from the shell half. If they are still in their sockets, gently pry them loose with the plastic opening tool.
Solder the red battery wire to the point labeled BATT +, and the black battery wire to the point BATT -.
If the wire ends are not exposed, strip 3mm of insulation from the end using a wire stripper. Start with the black negative wire and wrap the exposed ends with electrical tape.