Oracle Expenses -No HCM -- Employee Bank details?

Summary

Oracle Expenses - No HCM -- How to enter Employee Bank details

Content

Hi Expense guru's 

We are on 20A patch level -- We have only Financials -- NO HCM/Employees section. 

We add employees as Users and we cannot see Employee page windows etc. 

While configuring Oracle expenses -- I could get user record and add Default expense account details. 

I could not do the following: 

a) Employee Bank Account details  -- Option is available at user level to enter Bank account -- is there any spreadsheet or REST API available to update details for all employees at once.