To connect your wallet and see the balance in the portfolio you only need the wallet’s public address and copy it to the “Connect wallet” dialog:
Examples of a public address for most common cryptocurrencies:
- Bitcoin: 1J7aU9S3e3P1ZQ3ZZSatu4ht1RpuSV2CcZ
- Ethereum: 0xFEeA1d9Ec4E7b4A95c60C15Df7f925dcFc097e90
Please note that some external wallets use a common public address for multiple clients or the public address is re-generated each time. In such cases you will not be able to connect the wallet (you may still try, but the balance will be wrong or missing).