Top view of left rear axle

The two upper links (blue in the illustration) form a triangle in the top view as do the two lower links (purple in the illustration).

The rear link (orange in the illustration) represents the toe rod.

Fig 1: Identifying HA 5 Links

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Identifying Components

Courtesy of BMW OF NORTH AMERICA, INC.