How to create Search Index for text field inside nested array of objects

I am not seeing a straightforward solution to this simple use case and would request someone from Mongodb to please look into it. In a nosql database creating embedded documents in the the way to structure relationships in many cases. So I have a nested array of objects. I do a $Search full text search on a nested object in a nested array and I get the parent collection back. The actual search results are in an object inside a nested array. So how then do I get a reference to the objects that the full text search found? I don’t need the entire document I need to be able to filter only those objects in the embedded/nested array that the $search found a match for. How do I do this?