Jon,
I was away for a while, and I'm just getting back to this - I read the thread again, and now I'm a bit confused again! /forums/images/graemlins/confused.gif Does the adaptor you mentioned plug into the big socket on the back of the tractor? I'm assuming not as that's not what you circled in the second picture? I'd be happy with any plug-in solution that would allow me to avoid cutting the wires (I'm good with wiring, I'd just rather not alter it).
We had a riding ring roughed in, and now I have a lot of work to do finishing it up. I'm realizing that I probably don't have enough daylight hours to accomplish it - so I'm going to need better lighting. I'd like to make up a nice harness to plug into an existing connector, even if it's not the one on the back.