Photon Enterprise Cloud adding a new plugin documentation reference - section not found

Photon Enterprise Cloud adding a new plugin..where is the section?

I wondered why from documents i can see the following steps but never find out a way to perform them...

To add a new plugin:
1. Go to the dashboard of one of the supported Photon product types.
2. Go to the management page of one of the Photon applications listed there.
3. Click on the "Create a new Plugin" button on bottom of the page.

..not sure, if I'm doing it alright but is that section no longer with the dashboard?

How could set up it as following doc says in such case?

Thanks in advance!