There is a coupler about 2/3 the way up the bottom/down tube where blue turns metallic. The KS keeps the tube from gouging into the ground.

That is a weird place for the shifter but I think that's because it wouldn't fit on the wheelchair rail that is used as a handlebar. The brakes are balanced. The company that built it did a very good job at quality control it appears. Tires inflated to proper psi even.