Link two objects B1IF

Hi experts,

I would like to know if there is a way to link 2 documents created in a scenario into B1 via B1IF.

e.g: I would like to create a Sale Order and an Invoice in the same scenario but I want the Invoice based on the curent Sale Order.

The field require for this is "BaseEntry" but it seems this field is on Read mode only, I can not write into it.

Do you have any sugggestions ?

Thank you