First look at the left hand instrument to determine heading, and it can only be North, South, East or West from the choices given. In diagram 1 this is North so the top left aircraft. Then look at the right hand instrument which shows where the beacon is relative to you. In diagram 1 it is behind you so the posters above are correct, its the top left aircraft in position 1.
In the second diagram the heading is South, so bottom right aircraft, the beacon is shown behind you and to your left so position 6.