I’m not entirely sure what you’re asking but based on my understanding, here’s my answer…
The return value is a TextReference. If you want to hook up TextBlock596 to your ReturnNode's ReturnValue, you’ll need to drag a node off TextBlock596 and GetText (Text) and then connect that function’s ReturnValue to your ReturnNode's ReturnValue.
I broke one of my UMG TextBlock’s bindings to show you what I mean:
