I think this will look even better for our kind of cars (including period :-) ):
Parking cams (I think you mean rear viewing cams) and microphones are not universal. It basically depends on the type of connector. Most cams can be connected but some require some fiddling. In regard to the microphone you should watch the impedance (not sure if that is the correct word :S)
EDIT: This is the rear view cam I used on my ZT-T. It works OK. It is connected to the video input called rear cam on my units loom.
