Again, since we have sister coaches, next time you're looking in that cabinet, look at the Audio 6/2 box closely. On the front, there is a molded connector - speaker out. On the rear, a small molded power and another large, molded speaker input. On my unit - which in theory should match yours, the wiring for the input side is no longer than 6 to 8 inches. When I move my Executive DVD-Home Theater unit, the Audio 6/2 box has to move also - as the wires are so short. The back of the Executive unit was all speaker-type spring wire connectors. So "maybe" with luck, they were not cut, just short and appeared that way. If so, there are several drop in replacements for the Executive that would allow your surround-a-sound to work as original. I've been looking at a few on EBay - but I'm lucky as my Executive units seems to be holding up well.
2008 Berkshire 360QS
with Mercedes Power
2010 Mini Cooper Convertible toad
2015 Nissan Frontier 4x4 pickup toad