The accessory I installed was a Powerlet socket to run an air compressor on. Powerlet is a company that makes connectors and sockets and I went with the European-style socket because it I like the way they work better then the standard American cigarette outlets and they are supposed to handle more power.
The PC-8 has 5 switched circuits (they are only hot when the bike is on), and 2 unswitched circuits and this Powerlet is wired to the unswitched since I may need to use it when the bike is not on.
The Powerlet socket, mounting bracket, and power-cable came as a kit for my bike so all the wires were cut and a perfect length. Go Eastern Beaver!!!
Here are my pics of the install: