New AIO

Hi guys im looking to upgrade my cpu fan since im using the stock one with the amd 5 5600. Now I have a asus b550m a wifi II. Which doesnt have a dedicated aio pump header. So when I get an aio which headers will go where. Sorry im new to this whole life. Just built this pc about a month ago with my buddy but want to upgrade my cpu cooling. Any help would be appreciated. Thanks