The hinges are in two pieces, the parts with the screw holes connect to the door and slide onto the printer clips. After printing the hinges, melt or glue a piece of metal rod or a finishing nail down the center to the hinge post for added strength. Clip the hinges to the front / side of the printer and adjust their position to your liking. Make sure the door will clear the knob and display, and opens fully. Mark where you will need to drill in four holes in the door for screws. Screw the hinges to the door and clip on the handle.