Your sketch indicates use of TWELVE fans. Although the case shown has space for that, do you really plan to install all of them? Most people would consider that real overkill!
IF that is your plan, you will need TWO fan HUBS. Just to clarify, a HUB has THREE types of connections, irrespective of the physical appearance of it. It has ONE input cable that connects to a single mobo header. It has several male output connectors where you plug in fans. Lastly (and this is where it differs from a Splitter) it has one cable (or connector) that MUST connect to a power output directly from the PSU so it can get enough power for all its fans and draw NO power from the host header. This connection usually is to a SATA power output from the PSU, although older models may connect to a PSU 4-pin Molex connector. Hubs typically have 4 to 8 output ports for fans.
Your diagram appears to show at the top a radiator (part of a liquid cooling system) fitted in a push / pull fashion with a total of six fans. ALL of those fans MUST be controlled via the CPU_FAN header in some fashion because that header always uses for guidance the temperature sensor inside the CPU chip. So that is one fan Hub for those six fans. Then all your other fans (bottom, side and rear) are case ventilation fans, and those as a group should be connected to a second Hub that is connected to your single CHA_FAN header. This header uses a different temp sensor on the mobo.