Not sure how much different a 06 R with mids is but the one I worked on, likely an earlier V+H version had no rear mount at all. The head pipes held it all in place. It had no brackets , nor did I see any means to mount it to the can. One area to be carefull with is on the clutch cover. Slide a 1/4"+ cardboard shim between it and the head pipe when installing and snugging the head pipes up. If not careful , it can rattle a nice dent into your clutch cover. The can also gets close to the frame at the rear. I added a small silicone circle to act as a bumper, should it vibrate against it. It never did but it's close. If you bolt it all up in your case that has bracketry, it should be obvious what plate needs to connect from frame to muffler, just before that last final snugging of the exhaust flanges.
You should also get the older thin 1130 exhaust seals for the heads. 65109-01. I've seen them on Amazon with the James brand. Dealer should have them or be able to get them. The late model tapered are too big and will crush over the hole of the pipe , choking it off some. They don't work worth shit is what I'm saying.
Ron