The servo mount is separated into two pieces in order to 3D print without support material. These two parts need to be glued together. The bottom surface should be flat and even. Join them together with CA glue and allow time to fully cure and set.
The body of the micro servo can be inserted into the servo box with the wiring fitting through the slit on the side. The servo box should be able to attached on top of LEGO bricks. Experiment with different placements, gears and mechanisms! PLug in the cable from the servo to one of the available headers in the SERVO section of the CRICKIT board.