No problem... here ya go!
The first picture is the instruction sheet showing how the little acrylic stand is supposed to be put together. As you can see in the second pic I drilled a small hole into the very top of the acrylic and fed a wire through. I then drilled a hole into the back of the bookcase and fed the wire through and secured it to the back of the bookcase. The third picture shows how this results in the acrylic piece hanging freely without any obvious or visible hardware.
You could have achieved the same result by taping magnets to the back wall of your shelf. You'd never have seen them from the front and there would have been no holes!