I'd attach a pair of Brothers using the central ring to attach the strop/winch connection.Just thinking about this. Would it be better to have two 1m strops connected to the strap ?? I’m wondering if the strop is designed to cope with lateral pull in its centre. It would probably be fine, but I’m just thinking out loud.
That way nothing can slip along in a lateral direction.
Or as you say, two strops joined in the middle with a shackle, to which the winch would be attached.