Fetching ALL data (including custom fields) from Zoho Connect trigger in Zoho Flow

Fetching ALL data (including custom fields) from Zoho Connect trigger in Zoho Flow

I have a Zoho Flow that is triggered whenever a task from a specific board is closed in Zoho Connect.  The task has several custom fields. 

In Zoho Flow, I cannot see a way to access these custom fields, even though the data *is* in the triggers output.

For example, the Zoho Connexct trigger output (in the history tab) contains fields such  "${CUSTOM_382245000000751005}": "Advisory Paper"

However, I cannot see how I can access this field in Zoho Flow. 

I suspect I need to get the entire trigger output as a map / string / collection and then use deluge to extract just the field I need.  However, I cannot see how to get that output.

Please help! :-)