How can I manually pair specific controllers/halfs of my keyboard to specific pre existing players?

I am using the new input system and my scene has 4 players in it. its a local multiplayer game and currently I can assign the current keyboard to one player and the current gamepad to another but cant separate gamepads and keyboard halfs. everything is just using gamepad current. I have been searching for 6 days and everything is saying to use input managers and player input stuff but I cant because my scene already starts with 4 player objects and I would have to insatiate the players. I need a way to get individual input devices and assign them to scripts. anyone got a fix??

i have the same problem . I woud prefer to have the players in the scene and assign to them the Gamepad