With all 12 screws removed, it is possible to detach the plastic bottom cover from the top half of the boombox.

Push the bottom shell back slightly before pulling it up. The plastic bottom will lift up directly but there is a lip that fits under the black handle that must first be exposed, as seen in the image on the left.

The boombox's antenna must be straight in order for the bottom cover to be pulled up.

Several wires run between the bottom half and top half of the boombox. Take care not to damage or otherwise tear the wiring when opening the device.