Recalbox OS on Slice



I’m trying to get recalbox OS to work with Slice.
At first I could get RetroPie to work with Slice using a pre-made img-file and the .dts-file for my CM3.
The recalbox OS atm is just providing files for Noobs and I can’t imagine how to get this to work with Slice. Is there a way to use the Slice-flash like an SD-Card or something like this?

Kind regards,