FreshWork-CRM Workflow - Webhook - How to include more fields from other forms

Hi all,

We are exploring on FreshWork CRM’s Workflow management, using the Webhook event trigger.

In the Webhook configuration page, I can see that we can select the fields that we want to be POST to the '‘Callback URL’

But how can we select more fields which is not listed here in the Webhook configuration page?

For eg, now my Webhook is configured for Deal. So in the Webhook configuration, there are all these fields from Deal that I can choose (Blue highlighted). But I would need to select other fields from Contact (Red highlighted), how can I achieve this?

Kindly refer to the below image for better illustrate of my question:

Thank you.