Run them up the middle, between the wings. You can also use the Grab It. The best is running it up the middle in your situation.
One thing that hit me right away that maybe Aron can answer. I am kind a lost on what to do with the lid. The only straps that can connect come from the bottom of the Nomad panel and that is what Aron crosses to hold stuff in in the videos. However, when I tried this initially, it would really tend to want to pull the lid in a twisting fashion to the center. The other option is as pictured where those straps just run up the sides of that middle bag. I guess I should go watch the videos again.