E1: Purchase Order Management - Define the Container ID (CNID) at the order line level before the re

I managed, for one subsidiary, overseas Purchase Orders with a 3rd party logistic, managing for me all the warehousing. I exchange with him the PO expecteid to be received (using the standard EDI files F47016 and F47017)

When the containers are coming (1 or 2 weeks before the entry in the Warehouse), I receive, by E-Mail, from my supplier, an ASN with the container ID and the list of items in the container.

I want to define, in my PO lines, the container ID before to send to PO lines to my 3rd party logistic, in order to help him to know what is inside the container. It means that I want to define the container ID field (CNID) of my PO line (F4311) before to do the receipt (before to integrate the lines in the F47017).