You can add a new wallet address by login into your account then navigate to the transaction you would like to add the new Wallet Address too. Click on the "Connect Wallet" button within the transaction, then choose the desired wallet connection option (Wallet Connect, Meta Mask or Portis).
Please Note: If using a mobile wallet you will need to verify any action for the transaction within that wallet.
For security purposes, you will need to re-connect your wallet any time you sign a transaction step, deposit funds, or release funds.