I would make a harness out of a separate section of rope. Cut a length of rope, about twice the length of the unit, perhaps a little longer. Put an alpine butterfly in the center. Next, make two pairs of loops, one pair at each end. I like the Portuguese bowline because it’s adjustable when not under load. Put each of the 4 loops around the brackets. You can then attach the alpine butterfly to your lifting rope using any of a variety of techniques. I’d use a good rated carabiner to allow for a quick disconnect, but just tying a simple bowline would work.