Thanks for the input Nealtw and sixeightten. I completed the framing of my 40" high knee wall that will be the enclosure of a shower. I ripped out a garden tub and a 36"x36" shower to make a larger walk in shower. The top of the knee wall will have 3 sections of 50" high glass. I did the bracing on top as Nealtw provided input. I'll use sixeightten's input to complete the framing at the 45° corners - the only thing that didn't get completed before I took the pictures I am adding to show my final work.
I further anchored the wall to the trusses below as shown in the photos. I had to get creative due to the existing sewer, water, and gas lines running where the anchors were added. I used Simpson Strong-Tie HDB 8-5/8 in. 12-Gauge Galvanized Bolted Holdown with 36" long 5/8" threaded rods. I used a lot of force to try to move the wall and it "IS SOLID"!
Thanks again everyone.