Shut down and disconnect the Raspberry Pi from its power supply. Be sure to put it away
so that you do not accidentally apply both it and the battery connection. Put the batteries into the battery holder and fix the top plate of the chassis into place. Cover the metal
screws with little patches of insulating tape or Scotch tape to prevent accidental shorts with
the Raspberry Pi and then slip the Pi under the elastic band. Next, attach the motors to the
terminal block, as shown in Figure 11-5.