If it is fixed on the chassis frame, if it is fastened, the panel can be directly removed. (Be careful not to use brute force. Hold the upper cover of the chassis with one hand and insert the other hand into the space below the panel. ) As long as you break it off, the panel will be removed.
If it is screw method: two sides (generally cross screws) need to be removed, and the panel can be removed by unscrewing the screws.