The Job has a specific area called Custom Fields for information that companies want access to but there's nowhere else for it to go, much like the presence of Custom Fields on the Customer.
To add the necessary fields go to SedonaSetup > Custom Fields Setup (Job) in the JM area.
In the image below, there are corresponding fields to what are in the Custom Fields window of the Job.
After adding Text to the Text area custom fields, click apply to save and they will appear in the Job.
If text is added to the Tables fields, go to the corresponding Custom Fields table.
Add new options by clicking new in the table window.
Click apply to save.
Back in the Job Custom Fields window, the tables dropdown menus will have the newly added options.