Interfacing Secondary Costing information for employee

Hi,

We have a scenario where we are interfacing employee data from another system (Workday) into Oracle.

Existing accounting flex field setup in Oracle:

Segment1 : Company Code

Segment2 : Cost Center Code

Segment3 : Product Code

Segment4 : Account Code

Segment5 : Project Code

So while interfacing secondary costing (Employee>Assignment>Others(Costing)) details, we are expecting the whole string for above structure.

However, we are receiving only Cost Center or only Product code as its like that in Workday.

Now we need to figure out a solution to interface this information into Oracle so that the information is complete technically and of use for business.