safely put away rear covers in the boot

Guys is there a way I can safely put away those rear covers in the boot when I don't need them? I though my dealer showed me, but I'm not sure but now I just can't figure out how as they just don't fit anywhere.. is it possible? Coz I don't think putting them in garage makes any sense and I have seen other model BMW has a place in the boot itself to safely put them away...