Going further down the hierarchy rabbit hole, this is my morph injection folder for Victoria 4.  Note the path in the red box.  This is how DAZ places it's content.

The major problem with the DAZ content zips are that they are designed to be installed with their DAZ Install Manager software which is not so easy to work with unless you spend quality time understanding how it works.  I'm a wiz at it so I have no problems installing content in both Poser and DAZStudio but there are others that are very intimidated by it and just prefer to install content manually.  I do it occasionally and very often with free content that I am often correcting.