After much debate (with myself) on how to apply the art- I ended up researching and eventually purchasing a metal strap. I wrapped it around the pole and attached it to the 2 X 4's.
Reason- If for any reason I need to take it down it would be easier- and I tested out the pole- and it is like cement. It was easier to screw directly into the 2 x 4.
Thanks to the Green Project for helping me with the wood !