Removed the OEM license plate light, and fitted an LED tail/brake light. This light also has a clear light for illuminating the license plate. Originally, I bought this light for the 690R, but it looked ghetto on the 690R. So, on the shelf it went.
Now, it's a perfect fit for the AT.
For connections, I purchased a tail/brake light adapter harness from easternbeaver.com. Also, some spare contacts and the connectors for OEM turn signals. All this made for a splice-free integration.