So I finally got mine in the mail and installed it. There is a screw hole that is threaded that is front of the folding release button. There is no screw that comes with the unit, and the stock has no wobble, so I am not sure why the hole is there. At first I thought it could be for a tension screw, but when you look through the hole, it lines up on a seam and not an ideal place for a screw to press against the receiver.
The unit looks nice, but not as nice as the SB brace for the MPX, in my opinion. The SBTEVO is more polymer than most of the other models and has a lot less metal parts or reinforcements.
I wish SB Tactical would make a retractible brace for the Scorpion that looks just like the retractable stock available for the scorpion, or make one similar to their retractible brace for the MPX. That would be badass.
All in all, it is a nice brace and looks good.