Is there a way to change the currency through SLA for Fixed Asset interfaces?

We set up a new secondary ledger that uses the same currency but a different rate type from the primary ledger.  To allow this, we set up a currency called '1BR' for the new secondary ledger which we have with a 1 to 1 relationship between BRL (the currency of the primary ledger).  When we set up the FA TAX book and linked it to the new secondary ledger, it also is using the '1BR' currency.  The business has asked us if there is a way to change the journal entries that come to this new secondary ledger from the