Inu Games - Modular Snap System Runtime

Hello, I bought the MSSR plugin and I was wondering how I go about using the physic handle to combine the mesh’s. I watched the YouTube clips and downloaded the example but I do not get how to make them a single object when the snap happens with the physics handle.
(example)The basic idea is I have a bunch of Lego blocks that can snap to each other on and off then I want to be able 3D print them as a whole.
How would I go about it?
Would I change the snap settings or spawn all of them in the same positions but in a new location with new snap settings?