The Audio Ports are the niches in the two sidewalls (Capt and FO) in which a plug (connector) for connecting the microphone.

A private manufacturer of this dummie ’Audio Port’ is composed of :

• Wooden frame with wooden plate;
• Metal plate with 2 screws;
• Plug handmic;
• Plastic framework.

To build the sidewalls, they are against the sidewalls mounted.

More info and photos : http://www.flightdeck737.be/hardware/platform/zijpanelen/inopbouwonderdelen/