Sorry, my explanation may not have been the most helpful. The radar I’m talking about is at the bottom center of the screen, it’s a square outlined in gray lines that’s hovering above the bottom viewscreen. (The square’s far edge is shorter due to perspective.) Your ship’s position is in the center of the square, at the corner of the blue V. The radar shows the enemy ships as small red squares, with white lines showing their 3D position.
In case it helps, here’s a video explaining how the radar in Elite: Dangerous works: https://youtu.be/JnyYs40dYfM?t=72 . The radar in my game basically does the same thing, except that it has a square area instead of a circle.