Today, I made some final decisions on antenna cable routing. In addition, I spent most of the afternoon trying to get a 90 degree BnC connector into the back of my KY97A. It was near the back side of the avionics tray, a place where it was difficult to get my snap ring pliers in. Finally, I made it with a different snap ring pliers from the bottom of the avionics trays. Next time -- install before installing the trays. Then, I installed one other antenna connector to the back of the KLX-135A.