Question PlayerInputManager: UpdateSplitScreen() is Called Before Cameras Are Set Up

With my current project I can set up the camera components for player prefabs only after they have already been instantiated; however UpdateSplitScreen() in the PlayerInputManager is called too early when a player joins and the player Camera components are null at that time, so splitscreen does not take effect. Is there a way to stop UpdateSplitScreen from triggering at the time of joining and possibly call it manually once cameras have been set up on the player instances?