Fan bracket for Supermicro SC747

I just got a server using the Supermicro SC747 chassis, but the fans are so loud, and there's quieter alternative unlike others models. I bought some Noctua NF-A9 in hope to use the same hot swappable bracket from the existing fans, but they don't works (they use a custom connector). I made theses bracket that fit in the original slot and it's working fine!