Sales agreement ID on sales order

Hi all,
I have a sales agreement that I would like to attach to a sales order . How can I do that? Where can i see the sales agreement ID on the sales order ?

On the sales order line > update line link > in the drop down under sales agreement there should be a “create link” option where you can select the agreement to link. I haven’t found that there is a field that shows the sales agreement ID on the sales order, but once linked, you can reference it in the same update line link and choose attached or the general ribbon tab > related information > attached sales agreement.