Slave Inputs

[oxfordaudio]

I wrote miniature stereo jack plug cable (both ends) what I meant was miniature stereo jack to miniature stereo jack, to be more conventional in nomenclature, sorry.
The connectors are the same as the miniature jacks on headphones ⅛" (I think) TRS rather than the standard ¼" TRS

and the cable in-between? plain old copper?

My understanding is that the quality of the cable is not significant; it is an analogue stereo 3.5 jack to stereo 3.5 jack. However you do need to take care that the surround of the plug is not too bulky otherwise it won't plug in fully to the master as it fouls the bottom lip of the casing.