In case anyone cares, there is something missing in the instructions, or a couple of things.
First, the kit includes longer bolts for attaching the rear of the rails to the front fender mounts. These are impossible to insert with the front tire in place. So I'm using the old, shorter bolts temporarily until I'm in a position to remove the front wheel.
Less interesting, is how imprecise are the locating instructions -- one must drill two holes in the fender, corresponding to the bracket attaching the front part of the rails. With no location marks (such as the dots on the handle bars), measuring on a curved surface can be challenging, and the instructions seem incomplete in this respect.