Installed firewall passthrough fittings for the throttle, prop, mixture, alternate air, and oil cooler shutter cables: 1. Detached all cables at their forward ends and installed the swivel-ball rings over the cables. 2. Installed the swivel-balls and their holder rings to the firewall. 3. Re-attached all three main cables at their forward ends. Final adjustment of the three main cables will take place once the throttle quadrant is permanently installed.