MSS Approve Payable time search fields

Hello,

We are just trying to figure out how the search fields are populated on the MSS Approve Payable time page. on the further analysis, we could see that based on the below setup page where the user has the option to select /deselect the fields to show up on the search page.

Set Up HCM > Install > Product Specific > Time and Labor Installation > Manager Search Defaults

the second thing we are trying to figure out is how the prompt records are associated for each field, for example, first_name, and last_name. We would like to know how the prompt tables getting assigned dynamically. on the record, in the field properties, we don't see any EDIT table as well.