Automatic SmoothFollow Target Assingment in a SplitScreen Game

How can I make the SmoothFollow script thats incluided with Unity to automaticaly find and assign a target, so im making a splitscreen game, and i want to cameras to follow targets that arent taken yet. Is there a way how to make the script find a target to assign that isnt already in use of someone elses camera, the players in the splitscreen game are instantiated since i gave the ability to player to choose what kind of player they want to play with. I need urgent help for my game