You gently, so very gently, slide the brain’s frame into the back of the head. Two phone motherboards are angled to fit against the inner walls of the head, against rubber plates for impact protection. Between them is a large ring with innumerable contacts, wires extending off them from both the top and bottom of the ring. Some travel to other parts of the head. Most of them run into a hard, segmented conduit that will plug into where the neck meets the body, once you get the neck assembled. For now, however, the head rests disembodied on a workbench.