This adapter mounting bracket does not fit natively in the HDD tray of my Be Quiet Silent Base 600 case, so I had to tweak it to be able to use it. And I tweaked it as well to locate the HDD connectors on the other side of the adapter (the opposite side of the handle), because it is more convenient, to my point of view... But to be honest I think this one-piece-no-tool adapter is a very clever solution :-)
All ok.