The upper grill there is left off and it has a grill to cover where the stock winch is. I don’t have a measuring tape to give you measurements right now. But if 6000# is enough the Polaris 6000# winch comes with all the required wiring, a wireless remote and controller, and plugs directly into the harness at the firewall that the stock 4500# plugs in to.
The bumper also comes with a bull bar that goes up over that upper winch area. I just removed it for looks.