FYI, upon installing FB Spatial Workstation it places a nuendo 8.2 sample project here:
C:\Program Files\FB360 Spatial Workstation\Nuendo\SpatialWorkstation
The documentation is helpful:
https://facebookincubator.github.io/facebook-360-spatial-workstation/Documentation/SpatialWorkstation/SpatialWorkstation.html#using-nuendo
You can download the FB plugs here:
https://facebook360.fb.com/spatial-workstation/
I notice that FB specifies using 3rd order whereas steinberg says 2nd order in their documentation about using FB Spatial Workstation.
Also, in the sample project, the FB Spatializer can be selected as a panner (rather than an insert).