Thanks again ppro. This kind of confirms what I suspected, that I will have to trace the wires myself. Everyone seems to be asking the right questions,(see ssl92677's post at https://www.crossfireforum.org/forum...hlight=amp+pin ), but everyone stops short at the answer. One of the last posts in this thread states "Am I to assume no one has yet to figure out ssl92677's question as to which of the pins 7 or 10 and 6 or 9 on the ampifier input is for the front or the back speakers?" It looks like this is a correct assumption!
Thanks for the help ppro.