I finished soldering up the brass wires, and everything seems to be connected properly. I am happy with it. It was fiddly and difficult with the tools I had so don't want to undo it.

I plug it in and my computer doesn't screen about overcurrent on the USB port so it's ok to now. I uploaded blink and that worked fine. I upload the OLED sketch, nothing happens, so I upload the i2c scanner sketch to find out if they are connected properly and I don't see any in the serial log. I have no idea what I have done wrong but chances are I have not connected somethig correctly.

This is why breadboarding is important! So now I will desolder things and try again...