1. Installed the cabin heat knob mounting plate onto the back of the knob. 2. Ran the cabin heat cable through the firewall passthrough and routed the cable to the general vicinity of the cabin heat box. Began planning how I will fasten the cable to surrounding structure to hold it in place and also align it with the heat box. 3. Began the final installation of the throttle quadrant. Measured the final available throw of the levers in the quadrant and double-checked these against the requirements of the items they're connected to. I had to move the throttle and mixture cables slightly forward, which required disassembling their passthroughs. I also decided to use the upper hole on the mixture arm, which will give me just a bit more throw of the arm. Then I began installing the actual quadrant, which I can tell is going to be a big challenge due to the close confines of the area and the fact that you can't see what you're working on. I began by connecting the backup PTT switch harness and prepping the throttle switch harness. I positioned the quadrant and began trying to simultaneously disassemble it just enough to slide it into position, but not let it fall apart completely. (It is made up of over 15 different parts, all held together by the same bolts that attach it to the airplane. Yikes.) I may have to assemble the quadrant in place, one piece at a time, from outboard to inboard...