Send Invoice/order Confirmation To Second Email In Profile

Working with a client that has CS-CART 4.11

They have added a second email address in the profile

they would like to send the order confirmation and invoice to both the login email address and the secondary email address newly created in the profile. The secondary email field shows up on check out and is filled in and can see it in the database, but I haven't a clue how to get the order confirmation to that email. Tried in the app/schemas/notifications/events to add the second email to the "to" field but doesn't work.

Any one have any ideas on how to get this to work?

How did you update the "to" parameter in schema?