Go to the security section in the upper right corner of the dashboard, and click on Safelisted Addresses. You will be required to provide the BTC/USDC destination wallet address, as well as the name you want to label it with, for easier reference. Bear in mind that you will need to be on TOTP Authentication (i.e. Google Authenticator, Authy or similar) in order to do this.
Please note that any modification (adding or eliminating) will trigger a cooldown period.