I think they are taking some poetic license with the "fender and rack mounts". It looks like there is a threaded mount on the rear seat stay for the lower leg of a rack. I suspect that they want you to mount the upper stays on the rack to the seat post collar. You could use something like the Problem Solvers seat collar rack mount. I don't see any kind of mount on the fork at all. It's a stretch to say that this bike has "fender and rack mounts" when you have to use a work around to mount them.

The stays on Tubus racks are very stiff. Even if you have to bend the stay to make it fit, the stay is really only there to stabilize the rack rather than carry much of the load. On the other hand, if you used a Tubus Vega and the seat collar rack mount, you probably wouldn't have to bend the stays as much. I would suggest getting longer stays for the rack which you can get from Ortliebusa. These are quite a bit longer (by about 100mm) than the normal stays and they are helpful for smaller bikes.

You can also use only one stay on the Vega and still have a stable mount. I've had to do that on my wife's Terry Symmetry. Because of the small frame, the brake interferes with the mount on the left side. I just ran one stay to the right and have never had problems. Here's what it looks like.



That's one of the 350mm stays on the rack. I did have to trim the end to fit, however.