Create Cube marker streaming assets for Hololens

How to make cube streaming assets for Hololens ARToolkit unity3d?. I have integrated Hololens AR Toolkit Unity3d plugin in my unity3d project and it is working fine. But currently i want to create a cube marker and instantiate an object (Minion) on it at few distance away from the cube marker. But i don’t know how its possible. Please help me for the same.

I looking for this too , do u have solution?