How can I retrieve a value from the grid in the form header using Logic Extension/Orchestration??

Hi,

How can I retrieve a value from the grid in the form header using Logic Extension/Orchestration?

I would like to be able to see the values from the column "Reference 2" in the form header in P43081|W43081B (see pic.1).

The problem is that the values in the form header and the grid have different AIS (see pic.2 for the form header and pic.3 for the grid).

Values for each line will always be the same, so technically it can retrieve the value from the first line, as this value is set for the whole order.

I would be grateful for any tips.