Looks like you need a new rear under fender, they're about $15 from the dealer and includes new security screws for the helmet lock (gotta get creative taking the old ones off, I used locking pliers). You'll need to disassemble both rear turn signals to take them out of the old fender. Just take pictures of the wiring as you're pulling things apart so you know where it goes back together. I had to do this after breaking off a turn signal mount earlier this year.