Linking Zoho Subscriptions customer_id to the card_id when creating a card

Linking Zoho Subscriptions customer_id to the card_id when creating a card

Hello,

Trying to make sense of Zoho Subscriptions API.

How would you link the card_id to the customer_id when creating the card?

The API Documentation does not specify customer_id as an attribute when creating a card (see this  https://www.zoho.com/subscriptions/api/v1/#Cards_Create_a_new_credit_card)

Should I just add customer_id as the attribute, despite the fact that the API documentation doesn't list it?

Thanks,

Mykola Bashlakov