So we have a mystery.
OK, here is the VIN from another 12 that looks from the photo below to have a three prong:1C6RD6LTXCS301511
I was hoping to find a 12 with only a two prong for comparison but I'm having trouble finding a VIN for a 2012 that has a two prong. I think some of the earlier 2012's came that way but I can't find one on the web. Some of the ones I found might have a two prong but I can't confirm because it doesn't have a picture.