The toughest part will be finding a place to mount it. Once you have it set up you won't have to fiddle with it. But you will have to be able to get at it to do the initial adjustments. Look around for the smallest one you can find. Check out how sensitive they are to their mounting position, some need to very close to horizontal. I put mine in the RH fairing pocket, have seen them in the top trunk. Then you just have to gain access to the brake signal.
Might add one word of caution. Learn how, if you don't know already, to adjust the brake shoes so they have the correct spacing to the drums. Brakes that are adjusted too loose can have a tendency to lock up during an abrupt bounce of the trailer. Don't ask me how I know this, please. It can be avoided by keeping them adjusted properly.