I want to get an L2 charger for my 2013 and in doing my research there's one point i don't get the nuances of: why are there so many NEMA outlet options? for instance, Clipper Creek offers the plug-in LCS 20 with four different NEMA configurations. I've done my best to search the forum but I couldn't find a discussion on why one type of plug might be preferable over the other. Is it simply a matter of what a home may already have so you want to make sure you get that connector? If one is installing from scratch, like I am, which is the optimal choice?