Look what I found on Youtube! There is no mention of the particular way of the hookup but sure looks like similar setup to what you are building. He talks about a Mile Marker 105 winch being used.
YouTube - Three Point Hydraulic Winch on a Tractor First Generation
YouTube - Micro Logging with a hydraulic winch and 33hp New Holland Tractor
YouTube - oldboytoys's Channel
YouTube - Three Point Hydraulic Winch on a Tractor First Generation
YouTube - Micro Logging with a hydraulic winch and 33hp New Holland Tractor
YouTube - oldboytoys's Channel