Actually, I have some pictures on my photobucket page but I'm not sure if I showed anything other than the finished product. I'll check and then edit this post.
Well, I do have some pictures but they're all after the install. See below.
As you can see in the last picture I almost got mine so low that the frame would not fit on the curve of the panel. What I recommend is that you measure to the center of the existing door, then drill a hole in the other side at that same location. Expand the hole enough that you can reach inside and determine where the frame is. It will be above the hole you drilled. Then make your full cutout to be enough below the frame that the opending in the door frame will be just below that.
If you're not sure what's there, take a look underneath. There should be some openings, just like on the original side. That's good for air circulation in that compartment. You could probably use a flashlight and hand mirror to see up in there. As you can see in my first picture, there are some wires in there but they're at the bottom at the back of the compartment and present no problem.
This is really an easy modification. Just remember that I did it. And therefore it has to be easy.
By the way, after these pictures I removed each door and frame and flipped them over so the door hinge is at the top. I did that after a door came loose on the road and got ripped off somewhere in Texas or New Mexico. Now if it comes loose at least it doesn't flop down. The problem now is I haven't figured out how to keep the door open when I'm removing a hose. I have to hold it in place. Same on both sides.