In my particular situation, I can manually move or copy the Animals folder into the DS Library without any conflict or challenge.  As I mentioned before, MACs have a tendency to overwrite folders rather than merging them, a very annoying feature.  The next folder down in the ZIP file is 'data' but the 'data' folder contains subfolders for other produces, so you'll need to open both those folders to see what it contains.  In the illustration below, there is no HiveWire 3D folder in the DS library, so I can manually move/copy that ZIP file over.

At this point, you should be able to see the pattern of manually installing 3rd party DAZ content into DAZStudio.  If you take your time and think it through, you should be able get your purchases installed correctly.