So, I was thinking of other ways to make a SAO other than sending off for a PC board, and I thought about the super cheap mini-breadboards I'd seen online. A quick Amazon order, and I got 12 of then sent to my door for about $8.
These have a sticky foam backing which can be easily pealed off, leaving the bus bars exposed.
I had some surface mount 2x3 connectors for another SAO I'm making, and I did a quick fit check to see that the spacing was compatible with the breadboard, and that the legs would span the distance across the gap in the middle.
Soldering by hand wasn't too bad, but I recommend roughing up and cleaning the section, as well as applying a fair amount of extra flux. I ended up applying solder to all six bars, then positioning the connector and soldering pins one at a time. The mechanical strength of one connection isn't very good, but by the time you get all six, it's a bit more reliable. I wouldn't want to yank the SAO off my badge, but it didn't seem to give much.
After checking the solder work with a multimeter in continuity beep mode, I had to rework one connection, but after that, everything seemed good. I finished by covering the exposed bus bars with some Kapton tape.
and for the demo image, I made the simplest LED circuit I could using spare parts from my bins.
This is genius.