How do I add icon artwork if "connected to Plex"

Hi Forum. I just can’t figure out how to stream directly from my usb discs, so I have been using connected to Plex as a source which works good enough for me. BUT I would really like to add art work to my libraries - how do I do that?

If your files are included to your Plex Server, you maintain the Artwork in Plex. Infuse will download the artwork from you PMS

Thanks for your reply. But how do I do that I Plex?

Try google it

This gives a pretty good result

“How do I change cover art in Plex”

And here you will find instructions on how to edit metadata in Plex