Lay a piece of wide tape on your work surface, sticky side up. Tape this piece to the table at the edges so it doesn't slide around or lift up!
Use tweezers to arrange six pixels in a circle, with the + sides towards the inside of the circle.
Strip a piece of wire and form it into a circle appropriately sized to match up with all the + pads on the pixels and solder in place.
Remove the ring from the tape.
Use a long piece of wire in another circle to connect all the grounds (-) together. To reduce the possibility of shorts, we used an insulated wire that's had the insulation stripped just in the spots where the wire meets the pixel.
Solder the circle to the "posts."
Connect the seventh pixel in the center, soldering + to the center circle, - with an insulated wire to the outer ground ring, and the data input from the data output of the last unconnected pixel in the ring as shown.