The ObjectTarget prefab is an empty object with a ObjectTargetBaseBehaviour.
You can set a few values that can be used by the ObjectTargetBaseBehaviour.Start.
See ObjectTargetBaseBehaviour for more details.
Rotation of object under the ObjectTarget should be set to,
X: 90 y: 180 z: 0
Loader can be set to load the target at start. It has the same effect to call Bind(ObjectTargetBaseBehaviour) when it is set.