Redwood extensions attributes: Freight Terms, Shipment Priority and Receivables Transactions Type

Summary:

Extension works in Redwood for these attributes: Line Type, Warehouse and Subinventory;

Extension does not work for these attributes: Freight Terms, Shipment Priority and Receivables Transactions Type. I would like to understand what value is required and for what attribute. Thank you for your help.

Content (please ensure you mask any confidential information):

Here is the script:

String orderTypeCode = header.getAttribute("TransactionTypeCode");

if( orderTypeCode.equals("Commande externe") ) {
}

def lines = header.getAttribute("Lines");// Get the lines for the row set.

while( lines.hasNext() ) {// If more order lines exist...
def line = lines.next();

line.setAttribute("BillingTransactionTypeIdentifier", "What value is required here? The value we see in the UI does not work. If an ID is required where can I find it or what is the table that contain this value?