It's for my '99 -- this is super helpful. So basically the stock amp has a harness built in that runs to the factory stereo, outputs for the speakers, and the antennae? I'd definitely take you up on that -- will PM you.
Mine is a 2000 limited, so I'm not positive about what it may look like on others, but for the 2000 limited, there are two round single pin plugs that connect to the head unit for the two antennas. Then there is a single white multipin connector which plugs in to the back of the head unit, and it comes from the stock amp. The wiring running between the stock amp and the stock head unit is integral to the stock amp. I have attached a couple of pictures of what I have. They may not show exactly what you need to see, so let me know if you want to see any other angles.

