The parts that have been cut from the bigger files are designed to be glued together with short pieces of paperclip in the holes for strength, and to make gluing easier. Use the full sized stls as a guide for how to assemble the two parts. The masthead has space for a peg in it to glue the whole thing together.
MyMiniFactory License. You can use this 3D model for your own commercial purposes. Please credit the designer when sharing this model.