Latch instructions
I used that latch (and like it a lot), but also had to figure out how to install the spring. There is a threaded bolt hole in both latch pieces, and the spring runs between them. I made a special 'hook' for the aft attachment - looks like a washer with a tab bent for the spring to hook on.
Here is a picture of my installation: (www) .wideopenwest.com/~glaesers/RV7A/Graphics/CanopyLatch1.JPG
For some reason, the link doesn't post correctly if I leave it together, so you'll have to cut and past the string above, and get rid of the parenthesis.
That's the best pic I have at the moment. If that doesn't clear things up for you, let me more and I'll take more pictures.
I had to file the pieces smooth, and I also drilled lightening holes, similar to what they show on their website. I think the dimensions of the rotation bolts are the same as the Vans latch.
After I painted the angles, I put a strip of UHMW tape on them for 'lubrication'. It works great.