Then make your variables public and drag them in!!
Don’t fight The Unity Way™. 
(I think I posted this to you in the past…)
Remember the first rule of GameObject.Find():
Do not use GameObject.Find();
More information: Regarding GameObject.Find · UnityTipsRedux
More information: Why cant i find the other objects?
In general, DO NOT use Find-like or GetComponent/AddComponent-like methods unless there truly is no other way, eg, dynamic runtime discovery of arbitrary objects. These mechanisms are for extremely-advanced use ONLY.
If something is built into your scene or prefab, make a script and drag the reference(s) in. That will let you experience the highest rate of The Unity Way™ success of accessing things in your game.