Carolyn,
I don't have any pics of that thing but I could take some. Tied up today so maybe tomorrow I'll do it. Considering the cost factors of finding the leak, fixing it, etc I just bought a $20 1 gallon sprayer at Home Depot or someplace dedicated to this leak finding task. For the vacuum line hose attachment you can blob silicone seal to the sprayer thing and let it cure for a day. I always keep a few caulking size tubes of that stuff around. Also, I never worried about the dye staining the liner. Seems like it might but never had a problem because it disperses relatively fast and the chlorine will get rid of the color.
Al