With sselph’s scraper he keeps them in their respective ROM folers, by default with the built in scraper for emulation station the scraped files go into /home/pi/.emulationstation/gamelists… Somewhere in there- I don’t have my pi right now so I don’t remember the exact location, but once you see the folders with a bunch of images you’ll know youre in the right spot, if I remember they were set up in folders by console. You can really place them anywhere as long as you remember the file path because that’s what you’ll be typing in once you start adding metadata manually.