Aux wire connection

[mahrukhjunaid.mj]

How to connect an aux wire in my sony mini hi fi system MHC GNZ55D

 

[americanaudiophile]

A good tech with the service manual might be able to install a switch and aux input but I suspect it would cost more than it's worth.
You could use a cassette tape adapter
https/www.amazon.com/Monoprice-103027-4-Port-Component-Learning/dp/B001TK9SEE
or a car fm transmitter with aux input (plus a 12v power supply to run it).
https/www.amazon.com/Bluetooth-Transmitter-LDesign-Handsfree-Smartphone/dp/B01CC7YMVG/ref=sr_1_5?ie=UTF8&qid=1513107874&sr=8-5&keywords=fm+transmitter+with+aux+input