They can be identified by the Relic icon on your map - a stylised blue 'R' - and will show up when you're nearby, much like Cyberpunk 2077 Tarot Cards do. You'll also be able to hear them if you ...

When you reach the Cyberpunk 2077 Woodman interrogation during ... there unseen you'll be able to talk to him (go through the blue door as the glass one won't open). Even now, though, almost ...