Trying to replace the rear wiper, I picked up a Trico blade that should fit J hook and bayonet arms, but that's apparently not what I have. The RainX website lists no less than 10 different type of wiper blade connectors, and says my rear blade connector is Rock Lock 3. Is that a proprietary name? It sure doesn't seem to be a common type of connector I've seen in retail stores. What type of aftermarket blades/connectors will fit my '16?