I would recommend reaching out directly to Black Scorpion Outdoor Gear for assistance. You can find their contact information linked below:
https://www.blackscorpiongear.com/pages/contact-us
if you loosen the screens the plates move apart and are very easy to slide on. I recommend starting with every screw loose. then proceed to put on belt without the under belt and without going through belt loops. move your items where you want and tighten the mounts. then insert mags to the loose ball joints and test angles finally tightening these down. it provides the best way to fit your belt and setup.
Not impossible, just VERY tight. I got mine and got them on from the notched side by starting at a 45 degree angle and slide to position. I understand why Black Scorpion did this, because when they’re in position they DO NOT move, but getting them there could be a pain. Once in place and the velcro is stuck to the back, and ultimately the inner belt, these things aren’t going anywhere.