Update Case Origin When Activity is Converted

We are on D365 v9.1 on-prem. I wanted to know if there is a way to populate the origin of a case (incident) when an appointment, task or a custom activity gets converted without the need of a workflow or plugin. The options listed are Phone, Email, Web, Facebook, and Twitter but how can I include the Task, Appointment and custom?

Thank you in advance,

Chrys