I've been thinking about this too.
My concern is that the + cable from the battery to the solenoid pack (which is next to the winch) is always live.
What happens in a bingle? The + cable seems very exposed.
I know the + cable to the starter is the same, but it's all further back in the car.
Maybe mount the solenoid pack further back in the engine bay, and extend the cables to the winch?
Just wondering.........