That won’t work since there isn’t such a function in Traktor jet
What you can do is record that same loop with a loop recorder and then copy it to a remix decks. By doing this Traktor will also create an audio sample of that loop and store it in the music folder on your computer that you can load in to regular decks.
You can use the Duplicate Track command for that located in Add In>Track Deck. If you have “Duplicate deck when loading same track” enabled in the “Loading” tab it will copy over the source deck to the new one along with any active loops.
So for the shift + browse on the left side use “Duplicate Deck A” and change the assignment to Deck C and “Duplicate Deck B” for the right one with the assignment set to Deck D.