Most bunnies will clear a spot in the middle of their cage to lay it. Imagine having akwardly shaped things poking into you while your trying to sleep?

Also shavings arent good for bunnies anyways especially if they are directly on them. It can cause seriouse upper respratory problems.
You can just use ripped up news paper (like the strips). Dont just lay news paper down or else thge bottom of their feet will turn green.