- Is the view of this picture, the male connector from the backside (soldering side)?
It is not (as often) specified in the Service manual, sorry.
- Are the ground wires (of the input and output cables that I need to combine to the DIN), combined on PIN 2?
In my experience, they are but you may want it to be confirmed by someone else. Nevertheless, they’re is no other pin available so it must be this.