Need an update on nested Document

I need help on a Nested Document update. It is something as in attatched json

at a given point I have have document's _id, Servie __type and CategoryId

I have to find the Document with provided _id and from Services Array the Service with provided type and in that Service the Category with provided CategoryId.

After finding the Category i need to add 2 new fields in it you can add any test field in update statement.

I am using mongodb client no mongoose.