With your cardboard box snugly in place, shove the pole end of the tree into the X cut on the top of the box. You might have to remove the plastic base pieces the tree comes with, but they should easily slide off.

With your cardboard box snugly in place, shove the pole end of the tree into the X cut on the top of the box. You might have to remove the plastic base pieces the tree comes with, but they should easily slide off.