Sorry I didn’t see this, but my QD mount is not compatible (I have this buttstock), but I might be able to make a small adjustment on it to work, if I can ever make it work I’ll let ya’ll know.
I put the nut inside the qd cup and the screw head in from the opposite side with a small washer, using the shortest screw that came with the kit and first used pencil eraser to hold the nut in place to get it started then a small flathead screwdriver from a glasses repair kit put in between the flat of the nut and the qd cup wall to finish tightening.