Place the battery in the centre low down, above this place the light bulb, and a solar cell either side of the bulb. Attach cable from battery to bulb. Place an electric motor to the left and attach belt from it to left hand conveyor belt, attach cable to motor from left solar cell.
Place other electric motor on the right, and place 2 gears above and to the right of this. Attach cable from motor to right solar cell. Attach belt from left gear to motor and belt from right gear to conveyor belt. Good Luck