Selecting transform in FBX hierarchy csharp script

I am trying to set a transform called _target to an object in the hierarchy of a FBX object using csharp script.

I've got my script so that it selects the correct gameObject in the hierarchy of a FBX object. In this case it is Spine001_00.

 Transform test;
 test = transform.Find("Spine001_00");
 Debug.Log(test);

Debug.Log(test) gives the result on the console window of :

Spine001_00 (UnityEngine.Transform) UnityEngine.Debug:Log(Object)

The following lines of code set test to _target and _target to transform.

_target is used throughout the script to determine the transform (co-ordinates) of the camera target.

     test = _target;
     _target = transform;

Running the game with the Play icon sets _target not to the root of my FBX and not to Spine001_00 (which is one level down the hierarchy). I can select Spine001_00 or any other object in the hierarchy (I'm selecting bones which are read by Unity as gameobject type), and the target adjusts itself fine during run-time, but I still need to manually select it when the code written is for it to be automatic.

• Unity loses the focus of _target in the component editor on the inspector at run-time (ie _target is NONE) if the code is changed from

    test = transform.Find("Spine001_00");
  
  

  to

    test = transform.Find("/Spine001_00");
     
  

  which gives the result on the console window of

  null UnityEngine.Debug:Log(Object)