How to disassemble the card speaker? Yes, I looked everywhere for screws.

At the bottom of the four round feet, carefully pry open one with a utility knife. Generally, the screws are underneath. If there are no screws below, the following may happen:

1. If the front screen is easy to pry open, the screws are below.

2. There are still no screws, just clamp the upper and lower covers, insert a thin screwdriver or something into the gap and slide it away.