I use the center cable tie down on elevated stands but I believe anchoring the legs well (t posts) is more important for stability…Get one of those mobile home anchors that you twist into the ground. You can put it right under the stand. Use something strong like a big piece of pipe to twist it around and into the ground. It's best to get two people and a piece of strong rebar to twist it in. Then use some metal cable or chain and a turnbuckle to attach it to the stand. Drill a couple holes through the floor joists to run the cable through or a big lag screw or bolt to attach the chain.
And that is a great looking blind too!!