[Core P1 Build; Help?]

Greetings all; working on a mini-ITX build, featuring some ThermalTake tech, and hit a few snags ...was hoping you all could assist.
Components List:

Intel i7-7700K
ASUS Z270i mini-ITX
G-Skill TridentZ RGB 2x16GB3600
Samsung 960 Pro M.2 512GB
ASUS Poseidon GTX 1080 Ti
ThermalTake Core P1
ThermalTake Toughpower iRGB Plus 850W
ThermalTake Floe TT Premium 240mm

So, I got most everything hooked up, but haven't even bothered with the GPU until I have all the wiring figured out ...and that's the problem.
Regarding the Radiator/Heatsink; the data(?) cable for the lighting controller has three connectors:

1. Two connectors are USB Micro-B's; one for the controller, and the other to go ...where? - into a hypothetical second controller?
2. The other connector is a female 9-pin, with a blocked top-right/bottom-left, presumably for the motherboard ...except the ASUS Z270i doesn't appear to have an appropriate header. Closest thing I could find was an 'RGB_Header' male 4-pin, which seems to be specifically for light strips.

Regarding the PSU:

1. Again, has a USB Mini-B(?) connector, with a female 9-pin on the end, presumably for the motherboard, yet no appropriate header seems viable.

General queries:

1. Any chance all the RGB stuff can sync up? - between the ThermaleTake PSU, x2 Fans, and Pump ...and the ASUS Sync mobo, GPU, and RAM.
2. I put the radiator dead-center in the available bay; any preferences regarding position? - all the way to the top? - all the way to the bottom? - water lines coming from the bottom? - etc.
3. Is there even a difference between the stock Riser Cable I got with the P1 case and the 'TT Gaming' PCI-E Extender? - how could I tell the difference between the two? - if there is a difference, why was the P1 even shipped with the 'practically useless' one?!?

...at the end of the day, really just curious at-the-moment regarding the female 9-pins relating to the Controller and PSU, which ThermalTake seemed to assume I would understand and that my motherboard would have, while TT pointedly didn't explain and my mobo doesn't appear to have. Any alternatives? - can they operate without? - if they're that important, why were they practically ignored in all the documentation?