Flat screen TV tiedown

I bought the below pictured swingarm for my front TV. I made a plywood box to fit into the old metal cabinet that the old TV was in. As you can see in this photo this swingarm as a spring loaded lock in it so when you push the TV back it locks in place. So I figured I would attach bungee cords to hold it in place and keep it from rattling on the road. After I installed it I took the motorhome for a drive without bungee cords on the TV and I found that it doesn't rattle at all and I needed nothing more than this locking mount to keep the TV locked firmly in place. The new LED TV's are so light it really doesn't take a lot to hold them.