How open case of GL-XE300


I have built a custom Openwrt based on vanilla (22.03.3) for my GL-XE300 but I doesn’t boot (no Wifi/LAN led, no ssh, no admin panel).

I have seen in GL-iNet documentation that I can plug USB Serial adapter to see boot logs. I have removed the 4 screws on the rear panel but how can I open case of my router to not destroy it?


Need a tool like a knife:

See also video: