It is a long link which provides lateral location of a rigid axle. It usually remains roughly parallel to the axle, with one end joined with the body and the other attached to the axle.

provides sideways location of a live axle.

a single long rod which goes from the frame on one side to the axle housing all the way on the other side

Locating link in a rear axle running laterally across the car to prevent the axle moving laterally. It is fixed to the body or chassis frame at one end and the axle casing at the other.