3pin vs 4pin

Hello. I have a problem. I have 4-pin motherboard (https://www.gigabyte.com/Motherboard/B450M-DS3H-rev-1x#kf) and 3-pin fans (https://cougargaming.com/products/cooling/vortex-vx120/). I am using conventor (https://www.deepcool.com/products/Accessories/accessories/2021/11374.shtml) but my fans...

Using: DeepCool MATREXX 55 Case Antec 120mm Case Fan, RGB Case Fans, PC Fan, 4-PIN RGB, F12 Series (6 fans) Asus Prime X-470 Pro (with 4pin RGB Header) Case offers 3 pin RGB header. My Asus board and fans uses 4 pins. We daisy-chained the 6 fans and plugin the boards RGB 4 pin header...all good...