Hi Darkstar,
Same questions I have. Did you receive an answer? It’s January 2022, and no reply in this forum.
If it matters: the OLED works when I2C address ‘0x3C’ is used in (Circuitpython)code. So, you are correct. But I also do not understand the pads on the PCB. I’ll like to use them to change the I2C address, because ‘0x3C’ is used too often as I2C address by other OLED-displays.
Peter