Un-Brick Mijia Smart Home Security 1080p (MJSXJ05CM)

Hi !

I'm coming back because I disassembled the camera.
Now, I'd like to solder a serial port to get serial access and view (hopefully) where boot blocks.
The problem is that I do not know where are the pads TX0, RX0 and GND.

Can somebody help me please ? :D