Using one right now. There's not really a hub you can access easily, it's integrated into the front panel button thing at the top front of the case. The cables are also massively confusing, cos they chain to each other from fan to fan, but not like a splitter where 3 fans connect to individual cables. This goes from fan to fan and it doesn't make sense at all.
So what I did is move the 3 included fans to the back and top (it doesn't come with an exhaust fan), then put my CM ML360R with 3x SF120R at the front for intake. The 3 Phanteks fans are connected to the mobo individually, but my AIO is connected together via a splitter. I've got a splitter for the Phanteks fans to reduce the mess but haven't got time to do it yet.
So the RGB controller in the case that is connected to the RGB button is unused. I just control it with the motherboard software. In fact, I just set it to turn off at boot. Case is under my table and the window is facing the wall, wouldn't be able to see the RGB anyway.
PS: My mobo has a lot of ARGB headers, and fan headers. All of the Phanteks fans work with Cooler Master fans and splitters, as they all use the standard headers, except Corsair IIRC.