Looking to evaluate some possibilities for either replacing the unit or adding a sound processor. Does anyone have pics of the back of this thing? Does it have any external connections (RCA plugs or)??? Anyone have access to specs etc? Need to know before I jump on it......

Thinking about replacing all the speakers (Infinity) and adding a JBL MS-8. (car 2012 Passat TDI SE)

Thanks for the assist.