I know this may seem really silly, but I can't seem to make my mind think.  I've never used a towering cake stand and not sure about construction for the top tier.

For a wedding tomorrow, someone is making all the cupcakes and I'm doing the 4" top tier cake for the bridal couple to cut.  I know that the nut is screwed into the column, but since I don't have the column or stand here, I'm not familiar how much it will stick up?  And, would I need to tape the cardboard plate to the nut so it doesn't slip?  Or, is it flush to the plastic plate and I would just set the cardboard plate that has the 4" cake on top of the plastic plate?  I wouldn't think I would need to cut the "nut space" for the top tier cardboard plate, correct?  Please forgive my ignorance tonight, I just can't think.  

Thank you for any help you can give!

AI have 3 stands like this, and none of them have the head of the bolt sticking up through the top acrylic plate. You'll be safe to make your 4" cake as normal.

Hope this helps :-)