CASHOUT RDO hours

Hi -  Our workers work a 40hr week. Get paid for a 38 hrs week and accrue 2 hrs each week for a paid RDO. I have an employee who would like to cash out some accrued RDO hours for cash instead of taking the leave. How do I complete this process? Do i need to set up a new payroll category or can I just use our current 'RDO Paid' category.  Do they need to accrue additional annual and sick/personal leave for these CASHED out hours?

Appreciate any advice.

Thanks.