Unfortunately I don't and now that it is all assembled, I can't take it apart. I can try to explain it better though. If you see that copper wire that threads through the support cage, one of those wires is power and one is ground. Doesn't matter which. So you connect those to ground/power on the ring, and then also connect them to ground/power on the LEDs in the support cage. The USB cable has ground/power as well, so you just wire that to the copper wires as well. I don't have a picture, but I did power/ground on the support cage LEDs in a similar way to the ring. I just wrapped ground around one half of the circle, and power around the other half. You may need to get creative in how you place the resistors. It was a pretty tight fit and took some trial and error.
To answer your second question, yes, you can plug it into ANY USB power source, including a portable charger.