CC Email field is not presented in the v2 customer endpoint data

In the MYOB web dashboard., to create a customer contact., its interface is able to add email together with CC email for a customer address (see screenshot)., however., I can not find the "CC email" field in this MYOB endpoint api document

https://developer.myob.com/api/myob-business-api/v2/contact/customer/

., only the email field is there for a customer address