I have a component workflow in NWC which take several start variables, does some calculations, creates a sharepoint list item then outputs via a variable 'OutputCASEid'

In a different sharepoint site collection I have an office 365 nintex workflow starting on item created for a list.

This runs the 'Start workflow in Nintex Workflow Cloud'.

I enter the swagger URL and it does connect and presents the start variables.

It does not show the output variable.

How do I get the output of the NWC component workflow back into the 365 list workflow?