R12 - Manual journal entries transfer to secondary ledger at subledger level

Hi,

On R12, if we defined a subkedger level secondary ledger, is there a way to define a mapping between primary ledger and secondary ledger for manual journal entries made in the primary ledger?

I am asking this because all documentation we found state that for manuel JE, the GL Posting creates the same journal in the secondary ledger when subleger level transfer is defined.

Thanks.