I did get a few pictures. I have a demonstration for how I hook up the knee armor. I used JB Weld to fasten snaps on the inside of the of the knee armor. I then fastened snaps onto elastic, and fastened a buckle to the other end of the elastic. Here is what I've got ... I hope it helps.
This picture shows one of the slits in my jumpsuit as well as the zipper running down the back of my leg:
And this picture shows how I attach the knee armor. I feed the buckles on each end of the elastic through the slits, then connect both end of the buckles, and then zip the zipper to keep it hidden: