I decided to make a tote bag which calls for leather handles in the instructions. I found the handles which really match the fabric very well, but they came with no instructions. I can see that the oval portion of the handle ends which attach to the tote itself have little holes in them. Am I supposed to hand stitch the handles on (which would not seem very secure to me) or machine stitch using a leather needle and the holes are just a guide? Any help would be appreciated!