Resource's financial attributes are still not in Studio.
They can be XOG out though, start with filling out the fields for an existing resource, then do a XOG read and you should have the attributes in the output. They would look like this sample from the XML folder that comes with the XOG client installation:
<FinancialInformation>
<SupplementalInformation active="1" location="LOC1" department="DEPT1" resourceClass="RES1" transactionClass="TXN1" vendorCode="XOGVEN1"/>
<RatesNCosts targetbillingRate="200" targetPercentageBillable="100"/>
<Expenses reimbursementCurrency="EUR"/>
</FinancialInformation>
By the way, it is a good practice to keep the 'active' field turned off, and only turn it on when everything (projects are ready, departments structures are finalized, rates are ready, etc) is ready for financial transactions to start getting generated. This would prevent a situation where a lot of transactions getting rejected due to things missing, or having to un-do some transactions generated from timesheet posting.