Where can I grab the widgets that "fell in between" 2 monitors?

So I was planning on re-arranging my widgets between 2 monitors earlier. I dragged couple of my widgets from my secondary to my primary, but it disappeared. Any way to retrieve or delete those ones?

Reason why I was asking for “delete” because some of them, I can re-create.

Have you tried unplugging one of your monitors forcing all widgets back to your main?

The relevant config file should be ~/.config/plasma-org.kde.plasma.desktop-appletsrc

Please make sure you have a backup before trying to modify it. You can for example delete widgets and then restart kwin plasmashell --replace

Possibly you could also make them reappear with this config file. But I don’t know how.