Flow values from table SalesQuotationLine into CustQuotationTrans while Sales Quotation sent

We have 2- customized fields in table SalesQuotationLine and needs to flow into CustQuotationTrans while Sales Quotation gets sent then add these fields in CustQuotationTrans as well and assign values in this method
\Data Dictionary\Tables\CustQuotationTrans\Methods\initFromSalesQuotationLine