The smell of humans had to be on that cache box already and the mother still chose to keep her baby there. As long as you did not disturb the nesting area and did not handle the bunny..He will just fine and the Mother will probably not act differently. However, if the cache is visited often, and noone actually handles the nesting materials and/or the bunny..she will choose to move it to a quieter location. All should be fine.
Ginger aka Gigger