You'll need to run the game once, at which point there should be a folder with a bunch of numbers in that folder. It seems like the folder is here from what you've posted:
I could be wrong however, sorry for that I only use heroic for GOG games
But yeah, just paste the ER0000.sl2 file in that folder and all should be good, as long as you're using the same pirated version of EldenRing. If you start the game and it says save file currupted or something along those lines, though I doubt it will, you'll need the eldenring save manager mod to fix it. Again however, I doubt this is needed