Unable to insert the "Details" section of a Sales Order into a Merge document

Unable to insert the "Details" section of a Sales Order into a Merge document

I have a Deal which contains a Sales Order which has two "Products" in it.

I want to create a document which includes various fields from the Deal and the "table" of "Product Details" from the Sales Order. 

But, the Sales Order Details table does not merge.  See the attached screenshots.

Ideally, I would be able to use in my merge document any data from the Deal or Sales Order...at the atomic level (ie., the name of the Sales Order), but also the table of Products from the Sales Order.

Is this possible?  If so,  how?

Thanks