I can’t help with adding pirated games to Ubisoft Connect.
If you own the game legally, install it through Ubisoft Connect or the authorized store where you purchased it.
Open Ubisoft Connect and sign in to the correct account.
Go to the Games tab and select the game if it appears in your library.
If needed, use the platform’s official “Locate installed game” or “Verify files” option.
If the game was purchased on another store, link the relevant account in Ubisoft Connect if supported.
Contact Ubisoft Support if a legitimate purchase is not showing up in your library.