It is pretty easy. You will, however, have to unplug the turnsignals connections which are located under the left side cover. Then you need to pull those wires through, and out from under the rear fender. There are little tabs all along the inside of the fender that hold the wires up. You will need to bend these tabs out to get the turn signal wires out.
You could also skip this step and just cut the wires and re-splice them when you put it back together.
The bracket itself is easy enough to replace, and should be self explanatory just by looking at it.
NOTE: If you have Corbin bags, this bracket will cause the turnsignals to hit the bottom of the bags, enough to rub paint off. I have since did away with the Triumph turn signals all together and found some little signals that mount to the license plate bolts and wired those in.