You can do so using the BonusLink Mobile App, by following these steps:
1. Tap on BonusLink Card
2. On the Card page, navigate to the right top menu, and choose Add Card
3. Add your BonusLink Card number and click next.
4. If you're an existing Member with more than one card, you will be asked to select ONE Default Card. If you're a new Member, the card will now automatically be synced with your digital card.