Dave there's a clip on the inside of the tail holding it, comes off with some patient wiggles, a flat head screw driver helps if I recall.
Randy simply laid the cable that connects to the lock mechanism out the left side vent on the tail. After Randy told me how he did his, I did the same thing. I found a simple Zip tie around the cable kept it from moving too much. As for security, I doubt many "common thieves" would think to look there.
On my Super Hawk, which doesn't have an undertail, I relocated the lock right underneath the passenger seat, directly above the tire. Relocating the lock requires drilling a hole, some filing, and cutting a notch.
Good luck.