That latch goes all the way back to the 09 F150. I had a 12 that had it, my last truck had it, and now the 16 has it, and the SD went to all aluminum in 17 by using the F150 cab and consolidating the lines with the same interior pieces. You would think it would lower costs, but heck no! That Aluminum is not cheap to use or produce.
I found that raising the seat bottom up a bit slides the back down and out enough to reach in and release the factory latch. I drilled a hole in it , slipped a wire through the hole, and fastened a hoop strap to it. All it cost was time.
