Is it a stereo input from the mic socket Tony ?
Its possibly lost something in the Taiwanese translation about the Bass thing as I cant see why that would be called that.
If you have 3 wires coming from the mic socket then one is the ground and the other 2 left and right channels so I would say that ground is joined to the common ground pin with the headphone socket as per Hookies pic,with the other 2 going to mic and mic bass.
Either way round would be ok it would just reverse the left and right channels wich,with a single mic into a stereo input,wouldnt seperate anyway.
If it only has 2 wires then again it wouldnt matter which way round they went as its not polarity sensitive so I would go for mic to mic and make the mic bass the common ground