I'm building a carport using preformed blocks with anchors on level ground next to a slope. how can i brace it

the size is ten feet wide by twenty feet long and eight feet tall with four foot truss on on top. its being built on a level black top. i dug holes for the blocks. its free standing but i would like to add some support. its to far from the house to brace it. its about two feet from a hillside that drops about twenty feet. whats the best method and material bury on the slope and run a support towards the top.im using 4x6 on top of 4x4's. it will have roof shingles.