Wording of this Handout:
End pieces for the base of the manger. Insert these into the other leg piece.
This is the fold shape for the base, with the legs. The two flaps that go up, are inserted under the top flaps of the top of the manger.
Now you can staple these flaps, along with the end flaps of the top of the manger. (Four layers of paper with one staple.)
This is the fold shape for the top of the manger. Insert this end piece before stapling it and the base together.