I use an Eastern Beaver 3CS. It is installed under the bodywork on my 2011 near the positive jumper post. That is near the battery on mine...you would likely move it up front on the 2013 and newer models. On Nancy's GS I actually have a fuse block mounted forward, under the access panels in the trunk. That took some more extensive wiring, however. That panel is from an automotive store, but I don't recommend that approach. Use a motorcycle auxiliary fuse block...Eastern Beaver, CenTech, TricLED, and several others. You can get them switched, unswitched, or mixed. I recommend the diode option to protect the CANbus if it is available.