Having been thinking/assuming the location for Fredericton would likely be at the Irving BigStop by ran across this today in Oromocto, just a handful of KMs east of the BigStop. I don't know if this is a Supercharger location or not, but the area would be a good stop with lot's of places to eat either fast food or a sit down meal.
45.831772, -66.488905
45.831772, -66.488905