you can attach both ends like the joins in the rest of the binding. It is hard to expain without pictures, I have a quilt that I have to bind, I will try and do it tomorrow, it has to be done for Thurs anyway, and I will take pictures of it and post them for you to follow. Bacially you sew most of the binding on, leaving the two ends free, mark and join them on the 45 and then finish sewing them down, then you won't be able to just look and figure out where you started and ended as it will look like all the other joins.