Installing plugins and add-ons in capella 6.0

I am a new capella user, and while creating a project I encountered a problem with how to install add-ons and plugins in capella 6.0.
After downloading I move the same name folders to the chapel sections, what to do next?

To install M2Doc inside Capella, you can have a look at this page. When you install other add-ons, I would recommend using the update site method instead of the dropins one.

If you are stuck on a specific step let me know.