Hello,
The rope LED's have a 3M sticky bottom, so the are just stuck on the top edge of the 'A'. I had an Aliner before this one, and did the same thing.
I tapped into the power to the LED light cord where it comes out at the joint for the roof.....
Here is the link for the LED's. I got 3 and only used 2 for this project.
http://www.banggood.com/5M-SMD-5630-300-LED-Strip-Light-DC-12V-Waterproof-IP65-p-925551.html
Also got the 'Warm White' instead of the 'white'.