This is 100% correct.
The how-to section doesn't shed any light on how to install.
Can you give a link to the ¨how-to section¨ you were
The easiest way is to add this > 2. Additional (non-official) package source: >pardususer.de<
to your sources in Package Manager.
After this you can install this package in Package Manager.
This ^^^ is the easiest way I can make it.
And it has the benefit that you will also get future updates through Package Manager.
And if you want to surf to the repo, it´s in this link