This mod enables you to map the 3D Connexion Space Mouse Standard axes to FS2020.

The 3DConnexion drivers needs to be installed first.
Afterwards copy the XML file to:

%appdata%\3Dconnexion\3DxWare\Cfg

Don't use the 3DConnexion configurator for MSFS2020 after the mod. The mod will immediately been overwritten.
You can of course continue to use the 3DConnexion configurator for all other applications.

Enjoy.