Solder the LEDs

Solder the seven NeoPixel LEDs in place. Note the location of the "-" pad on the silkscreen, that's where the GND leg on the NeoPixel that has the notched corner goes.

Solder the Headers

Next, you'll solder the header pins for the QT Py in place. DO NOT SOLDER THE QT PY YET!

Flip the board over so the bottom side that has the QT Py outline on it is facing up.

Place two ten pin rows of headers into the holes and press the plastic spacers down so they are flush with the board. This will allow the overlapping keyswitch to be mounted flat.

Flip the board over while holding the pins in place (blue tac or tape can be helpful here) and solder them in place.

Solder the Keyswitches

Fit the keyswitches into their holes on the top side of the board (with the silkscreen outlines for the keys), being careful not to bend the fragile legs.

Flip the board over and solder the keyswitches.

Solder the QT Py

Now that the switches are soldered, you can solder the QT Py in place. Once soldered, you may optionally clip the excess header pin length.