It's all coming back off. I'm sending photos to them of what I have and see what I need for top mount. Like I said, it's what I have and it's not the final assembly. But I've been trying to read up on both, with nearly nothing out there on the subject. I can assure you though, if I drive out of my garage with a flipped setup and it isn't right, it'll go back in the garage until I either get the required parts or just go back to OEM. My intentions were to just buy new OEM. These were provided free. But they were also supposed to come with top mounting parts. Safety is always key.