This are the mounting points of the plate:
By the way, some cool data about the mileage. With my bike reaching 10K Km it's effiency is rising. Also note the wind influence with such big bikes. On this weekend trip to work (I'm a medieval reenactor and stunt fencer) I've done 400km, medium tail winds, fully loaded bike with GF on the back, average 115km/h, average 4,7l/100km. On the secound part of the trip, same 400km, medium to strong head winds, same load, average 140/150km/h, average 7l/100km.
Now the susprise, last part, 80km, little to no wind, same load but no GF, average 80km/h, 4,1l/100km