I've never seen those monitors in a manager's office, senior or otherwise. There's usually a monitor and other hardware (HDDs that record, joysticks to control camera movement for those that are equipped, etc.) for the camera feed(s) in a room that gets little traffic (storage room, computer cold room, somthing like that). It's rare for anyone to watch live at the station level other than messing around with it when it's new. Someone might watch remotely once in a blue moon but there's not much benefit to doing so.