Have been asked to make a helter skelter cake any ideas how to fix the slide to the cake

I had to google helter skelter to see what it's all about :)  From the images I pulled up I found this  one.  My guess is they used fruit roll for the slide.  That would be an easy way out :) 

To get the slide to stay, push it into the icing &/or use popcicle sticks or similar to hold it up.