Remove Addtional Contacts from Ticket

Hi,

I’m creating a workflow to remove the additional contacts on a ticket. As I understand it, I don’t modify the ticket. Instead, I should be deleting the additional contact. I’m using “Autotask API: Delete an object”, but the only fields are “Autotask Entity to Delete” and “ID of Entity to Delete”. I was expecting a field to specify the ticket number. If I delete the contact, I want to delete it from a specific ticket. I must be thinking of the fundamentals incorrectly.

Thanks,
Charley