Applicant Hire and Rehire - how to add ACA flag and default expense account fields

Is there a way to make the following fields enter-able during the Applicant Hire/Rehire process in self-service, so that they can be populated during hire?  We are on 12.2.

-ACA Full Time check box (People Enter & Maintain > Benefits)

- Default Expense Account (People Enter & Maintain > Assignment > Purchase Order Information)

Neither of these fields appear to be seeded on the person or assignment applicant hire screens.