One tip. If you see a panel that has screws it generally means there's something accessible behind it. Often as a transition point where wires or tubing make a transition from one direction to another. Mind that some panels overlap others, so it might be a matter of taking out two other panels to free the one you need. Which may necessitate moving/loosening other things (like side curtain tracks, etc).
Bright flashlights are hugely helpful too. Shine one into one end and look for where you can see the light from the other ends.
Lastly, the factory has been quite helpful lately when I've asked about questions like this.
-- Bill Kearney
2005 Eastbay 47 FB - Solstice