Luckily for all of us having a passenger back rest, the mounting point for the rest/luggage rack is attached to the frame with the bolt bosses protruding through the rear plastic cover. Those having a Basic Model have to purchase the mounting kit separately. The kit contains two replacement inserts with holes to accommodate the bolt bosses
Attachment 16732Attachment 16733
If I remember correctly, I believe the smaller Honda cargo rack also had a 6 lb rating. I have loaded my MP3 with a loaded tour pack and duffle strapped to the top of that. That weight was tight against the back of the passenger backrest and directly above the cargo rack mounting bolts.
I don't hang additional luggage on the back of the tour pack which would put more weight further back from the mounting bolts, to the rear most edge of the rack. No issues to date.
[SIGPIC][/SIGPIC]