Ah, spare connectors to prototype, I mean; the spare connectors aren’t needed in order to get the board to boot. Ha ha.
I got mine mostly assembled last week. Like every other piece of electronics in my CupCake kit, my motherboard had missing parts — I got five extra 4.7KΩ resistors instead of the five 1.8KΩ resistors. And unfortunately, that was another part for which I couldn’t find replacements at hand — although I did end up sorting and filing a bunch more SMT components while searching.
After waiting a week for the missing resistors as the solder paste was drying out and getting crusty, I gave up and baked the thing without them. I can hand-solder the 1.8KΩ resistors onto the board when they arrive. And because they’re voltage dividers for 5V → 3.3V level conversion to the mini-SD card and pull-ups for the I2C bus — neither of which is needed for basic operation — I can even run the darn thing without them. I just need to get them on there eventually.
Crusty solder paste bakes just as nicely as gooey solder paste, by the way.
I did spend a while searching for the placement of R1 on the PC board. I eventually found it through a combination of the process of elimination and checking the schematic. As far as I can tell, the name label didn’t make it anywhere onto the silkscreen — can you spot it?