RGB Header
RGB Header
You're using an Asus Z690 ProArt with an Arctic 360mm AIO and have connected the AIO to the only RGB header on your motherboard. You want to add three more A-RGB fans, but your motherboard doesn't have any A-RGB headers. You should look into installing a USB-based RGB controller or a PCIe RGB hub to expand your RGB options.
They seem to have an A-RGB "sharing splitter" for the 3-pin cable, which should work easily with a DIY setup. There are constraints based on the number of LEDs, but you might be able to try it. Just connect the AIO at the end of the fan chain.
No need to worry, you can connect the A-RGB headers to the RGB header if your motherboard supports it.