Field help (STOFCY_SQD) 

It is the storage site from where the goods will be shipped to deliver the quote line. The shipping site is initialized to the shipping site in the document header but it remains modifiable. This information can be used on the order and the delivery to manage the shipping of the goods.

A contextual button is used to select a warehouse type site for the company of the sales site and to access by tunnel to the site record if the user authorisations allow it.