Hi I am making a 3 tier faux wedding cake with gumpaste roses. The roses are all on wires and I have a few different sizes.

How do I attach them to the cake? If I just poke the wires through, will it hold enough or do I need to add something else to make them stay? 

And can I transport it like this?

Thanks
 

Stick them right into the Styrofoam cake dummy, it doesn't get any easier or better then that. If the wires are really flimsy fold it in 1/3's length-wise and twist the wire, to make it stronger/thicker.