UI Customization - Job Activation Time

System

Hi. I'm trying to add a column in the workflow tab that shows the job activation time. I have added a column to show the task activation time when you flip over to task view, but I'm having trouble getting something working for the job view.

The task_list works fine, but I'm having trouble finding a similar attribute for the whole job. The reference files on our system, as well as the UI customization guide hasn't been enough help for me.

What document, or paragraph have I not read and/or understood that I need to?

Craig

Here is my attempt in ui_custom.xml: