Hi, I drive a 1981 Mercedes 240d and it has the original Becker Europa cassette player, I took it out and opened it up thinking it would be an easy job to solder in an Auxillary audio input, however it turns out to be a bit more confusing then i imagined and id rather not snip any wires or make any connection unless i was absolutely sure what im doing.

Is there anyone that can give me some pointers, where to solder, or any diagrams or DIY websites would be very helpful.

Thank you