[New PC - Riing 12 Sync Edition RGB Fan Help]

Hi all

Building a new PC and just want to sanity check whether I can do this or if it will overload the Mobo and blow something up..

Case: Corsair 5000D Airflow (comes with 6 x 4-pin PWM fan repeater/hub). https://www.corsair.com/ww/en/Categories/Products/Cases/Mid-Tower-ATX-Cases/5000D-AIRFLOW-Tempered-Glass-Mid-Tower-ATX-PC-Case/p/CC-9011211-WW#tab-overview

Mobo: MSI B550M Mortar Max Wifi
https://download.msi.com/archive/mnu_exe/mb/MAGB550MMORTARMAXWIFI.pdf

Fans:
-2 x (3-Fan Pack of Riing 12 LED RGB Sync Edition fans) – https://www.thermaltake.com.au/riing-12-led-rgb-radiator-fan-sync-edition-3-fan-pack.html
Instructions for the Riing 12s – https://thermaltake-au.azureedge.net/media/productattach/db/support/usermanual/_a2485c9a43f4414b8f482246010b8d37.pdf
-2 x Corsair 5000D Case Fans
-1 x Artic Cooling F12 PWN Fan (https://www.scorptec.com.au/product/cooling/120mm-fans/88929-acfan00203a)

Questions:
1. The Riing 12s manual says I need to connect to the 12V RGB header on the Mobo. But the Mobo only has 1x 12V RBG header (JRBG1). Can I daisy chain 6 of the Riing 12 fans into the single JRGB1 header with no issues? Looking at the mobo manual the JRGB header has a max 3A rating, and the rated current for the Riing 12s are 0.2A – which will be total 1.2A for the 6 fans. But on the physical fan itself, the rating says 0.3A (I assume this is the motor and not the RGB?) – in which case the total would be 1.8A for the 6 fans. Would this be okay?

2. I want to use the supplied 6 x 4 pin PWN Fan hub with the case and connect all the fans to it; Can I use the supplied Riing12 3-splitter PWN cable to connect all 3 fans together and then into a single hub header? Effectively I will use 5 hub headers for the 9 fans that I have.

2a. The Fan Hub is powered by SATA cable from the PSU (so I don't need to worry about max amps here) and then I can connect the fan hub header directly to any fan connectors on the mobo (ie. SYS_FAN). Is this correct?

Any help would be greatly appreciated! Thanks!