The cords providing power to the fans for spinning purposes are hooked up to the AIO.
The cords providing the RGB to the fans are hooked up to the RGB hub with the LL120's.
Sorry if I made this confusing. I had a friend help build this computer and there wiring wasn't exactly wonderful, but who am I too say that.
The original ML120's were all hooked in with the AIO, but they didn't have the AIO hooked up via the USB connection on the side. Before the USB I was able to get RGB to the fans and the AIO, but I couldn't customize it in the iCue software. It was just simply rainbow. Once I got the USB hooked up to the AIO I was able to customize the AIO badge, but the ML120's wouldn't illuminate at all. That's when I unhooked them from the setup they had and moved them to the RGB hub.