I recently purchased 2 kinds of neopixel connectors from someone. One is a 4 pin, the other 9. Trying to figure out what the benefit is for a dual-strip build on a 9 pin connector. I read in Saber Armory that one could use a 9 pin connector for a dual-strip build and add a recharge port using the remaining pins. However I've found nothing on how to set it up that way and wonder even why one would prefer to do that instead of grounding it to the board. Anyone help? (It's my first build).