Guma,
Here are a couple of pics of how the swing-unders cup-holders are set-up. Please forgive the bad stain job. I only had time to get 3 coats on before the game, and I didn't worry about the sections you couldn't see while you were playing.
I had to cut a few inches off of the back piece because the lazy susans aren't as wide as the jumbo cupholders. They attach to the top of the wood I used for the cupholder w/ four screws, then you attach to the underside of your table w/ four screws. I believe I bought 5/8" screws, they don't have to bear much of a load.
The magnetic catches were 89 cents from Home Depot. Once you have the lazy susan attached. I attached the magnet first, then lined it into position, and marked where the metal plate should go. It holds it in place really well.
Here are a couple more pics of the lighted rail.
