Sub I was told is for the 12v socket. On your D model you don't have to get the inner supports. The rear grips are bolted to them. Have fun and go look at the how-to threads I put up. It'll save you some time.
Thanks, already read the entire process! Very helpful. Saved me the inner supports $.
Got everything ordered with the dealer last night. Pick up bike next Friday, had that day already off. Going to ride while wife visits family Friday. The dealer will help load it in van on Saturday for long trip home.