To keep the wiring within the case from getting too cluttered, I added a fan lid that covers the two fans and surrounding wires. This way the entire chassis looks very tidy inside.

At the same time, I moved the two fans to the bottom, which makes the heat dissipation path more clear. The connection cable starts from the expansion interface of PiSugar 3, enters the fan cover, and then connects to the control panel on the side. The control board is then connected to the OLED and fan through independent sockets.