Can we default Total/Vacant FTE to DFF (TOTAL_FTE_ORC) on position page using VB Studio?

Can we default the Total FTE or Vacant FTE value under incumbents' section from Position to the DFF field (TOTAL_FTE_ORC) on the Position page using VB Studio?

I have tried like this but it's not defaulting the total FTE or Vacant FTE value to Total FTE_ORC field

Main Requirement: while create the Job Requisition if position is FTE equal or exceeds total FTE then it should go for Approval

The Position DFF field values are defaulting to the Job Requisition DFF field.