Hamster question???!!!!!!!?

So i got diz cage for my hammie a href="http://pet.imageg.net/graphics/product_images/pPETS-3760254dt.jpg" rel="nofollow"http://pet.imageg.net/graphics/product_i…/a and im thinking on buying the lazy lookout from this cage a href="http://www.petdiscounters.com/assets/images/product_images/image/d_6376.jpg" rel="nofollow"http://www.petdiscounters.com/assets/ima…/a Where would i be able to attach the lazy lookout?