New fireplace problem?

I bought a new style selection electric fireplace from Lowe's a week ago, it was obviously a return or a display. We put it together tonight and noticed there were a lot of screws left and a lot of holes in the back of the fireplace, but there was no back that came with it? I thought maybe there wouldn't be because it's a wall fireplace, anyone else have this same fireplace or know if it should have a back with it? If so, I need to return it. Thanks.!