Your wallet is your delivery address
Cards are delivered on Solana, and so is $POMY. The wallet you sign in with holds your token and receives your cards. There is nothing to link and no delivery address to set — if you are looking for a "link a Solana wallet" step, there isn't one.
How delivery works
When you redeem a card or win a draw, the vault buys the exact listing on Collector Crypt and transfers the token to the address you signed in with. The vault pays all network fees for delivery. The card appears in your binder with the Solana transaction that delivered it.
Using a different wallet
Your credits, entries and cards are tied to the address that holds your $POMY. Signing in with a different wallet is a different account, with its own balance and its own credits. Cards already delivered are not affected; they are in whichever wallet received them.
What POMY can and cannot do
POMY can send card tokens to your address. It cannot move anything out of your wallet, sign for it, or see anything beyond its public contents.