Check this recent thread
There is a number of ways to attach. I cant really say "this" one is better.
Its a matter of preference. Cruise the pics on the forum and pick a way that suits "you". Or create your own!
I've seen patch, no patch, webbing, grosgrain, cord, plastic bottle caps, a product called "grip-clips, magnets, velcro...the list goes on and on. Almost anything can work. You can even use a smooth rock and cinch a line around the rock/fabric bundle.
Sometimes I just lean my trek pole against the sidewall and push it out (handle against fabric, tip planted in the ground)
When its all said and done, use some shockcord on the wall pullout/panel pulls to allow for some flex.