When you visit: https://sweepsouth.com/accounts/profile/cards/
You can click on 'Add new card' and fill in the necessary details. Once you've added the details you can click on save - the system will now verify the card. Ensure you add a new card prior to removing an older card.
If you book for multiple locations using different cards, at this stage you can also tick a location (address) to link to your card (this is the card that will then always be charged against bookings at that address).
Note: SweepSouth will make a temporary authorization on your card to verify it (R1.00). This is an authorization only and NOT a charge. Your bank may inform you of the authorization.