You should just find the right splitter that is best for you that can connect a lot of fans to. for example:
https://www.newegg.com/Product/Product.aspx?Item=9SIAE308816752
https://www.corsair.com/us/en/Categories/Products/CORSAIR-iCUE/c/Cor_Products_iCue_Compatibility?q=%3Afeatured%3AicueProductCategories%3ACor_Products_CorsairLink&text=#rotatingText
Here is a video for the corsair splitter: