Nanny's dollface

I have a Simply Sixteen and Little Foot frame. For my first quilt on the frame I had so much backing on my quilt that I was able to quilt end to end but on the wall hanging that I now have on the frame, I need additional inches maybe 12 inches or so. I saw where someone used Velcro on the take up roller on the frame but don't know what else or how she made the part to attach the Velcro or how she attached the leader ? To the quilt. Can someone instruct me on what I need and how to make what it is I need to e tend my quilt on the frame?
thank you so much