Hi, please see (new) pic 14 - first in the line I used the low noise adaptor NA-RC10 from the 60x25 kit - then I used the NA-AC2 3:2 pin adaptor cable from the 40x10 kit from my MOSFET project, too - see pic 15 (perhaps this cable is also in the 40x20 kit ??).
If you have no Noctua 3:2 adaptor, you need a seperat 3:2 pin adaptor cable as shown in pic 14:
Goobay 93628 PC Lüfter Stromkabel/Stromadapter, 3 Pin zu 2 Pinhttps://www.amazon.de/gp/product/B003D6O53Q/ref=ppx_yo_dt_b_asin_title_o08_s01?ie=UTF8&psc=1