Assigning a GameObject to the Follow box via code?

After spending ages trying to get my player to survive scenes, keep his health and score in tact, and get my player in the right position between scenes, I'm now faced with yet another problem. Once my next scene has loaded, the object to follow for that scene's CM vcam is missing. Initially, I just dropped my prefab of the player into each scene, but due to certain circumstances, I can no longer do that, so I need my player to transfer between scenes using DontDestroyOnLoad.

I don't suppose there's any way to drop the object I need into the Follow box via code on Start...? Is there any way to modify the script?

 

Great. Though I'm confused on what I can put or how. I tried adding a public variable GameObject called thePlayer for a reference, but it doesn't work. It's all set up different to what I'm used to. :-\