I don't know how well that will work with a concor, due to the shape of the rails/shell. It seems to me the bag will hang pretty low. This type of bag seems best suited to a plastic saddle.
If you're set on trying it, Velo Orange sells bolt-on loops. I did a cheap version using rubber-coated 1/4" stainless p-clamps and some d-rings that I found in the local hardware. Not super elegant, but it works.