eText format - how can add information from outside of grouping

Hi everyone

I have the payment file structure:

<OutboundPaymentInstruction>

     <PaymentInstructionInfo>

          ...

          <InstructionCreationDate>2019-08-09T16:46:31</InstructionCreationDate>

          ...

     </PaymentInstructionInfo>    

     ....

     <OutboundPayment>

     ...

     </OutboundPayment>

     <OutboundPayment>

     ...

     </OutboundPayment>

     <OutboundPayment>

     ...

     </OutboundPayment>

     ...

</OutboundPaymentInstruction>

I have an eText template format,

          ...

    

I need to insert inside to OutboundPyament group information from outside. For example in red location, I have to insert  InstructionCreationDate information, which is under PaymentInstructionInfo.

How can do that, as I cannot create variable in eText?

Thanks,

MihaiF