how to setup SLA for overriding segment values for refund or write off account

Summary:

I want to override a segment value (lets say Cost Center) for Refund or Receipt Write off line based on the Receivables account. How this can be done in easiest way? I have similar requirement for other activity like Adjustment where I could successfully manage to override cost center segment value picked up from Receivables line by using segment level account rule having source as 'Transaction Default Receivable Account'. I did similar config for Receipt Refund and Writeoff line but somehow it does not work here. Can someone please guide me on this?

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