Rear speakers? Did a search..........

[SteveBad]

I did a search, and all the "rear speaker" threads do not answer my question.
They all mention upgraded speakers, amps, etc.

I have '13 base Z, stock audio system, front speakers only..My question is this:

When I scroll thru the audio adjustments, it shows "FADE", which tells me that the unit will accomodate rear speakers, even though there are none.

Does anyone know if the head-to-harness plug will show the obvious place (empty slots) to connect up rear speakers?

I don't want to change any existing stuff, just add two rear speakers.

Also, how hard is it to get to the plug? Thanks!