I wouldn't bother with cuda on the flats until we've had a week of warm weather. It is way too cold for them now. In fact, they were dying this past Friday in the bay from the cold, and it's gotten worse since. The fish kill is happening even in the keys now.
I was just down an the dock oceanside, and carcases that were thrown off the end the other day are still sitting on the bottom. There are no fish at all - not even minnows, around the underwater light.
But when it does warm, the cheapest, easiest way is to tie a haywire twist with leader wire to the fly and a haywire twist loop 4-6 inches down on several flies. I'd go 6, but it's a little harder to throw. I'm sure there are plenty of videos of haywire twists if you havent done them. They are very easy to do.
Cuda are not leader shy, so you can get away with the following tippet setup.
Next comes a double looped tippet which will go through your wire loop. It's the same way you tie off the butt end of a bimini twist, but for cuda you can use it for the terminal end.
If you are using 20 Lb tippet, pull enough off the spool to double a section about the width of your shoulders but don't cut it off the spool.
You now have a loop held in your left hand and the tag end and standing line in your right hand. Wrap the tag and standing ends around your right index finger.
Put your left hand through the loop and start twisting keeping equal pressure on both lines forming the loop. Do about 30 or 40 twists. Hook the middle of the twisted lines over a cabinet knob or something and bring the looped end down to the tag end of the and grab it between the thumb and forefinger along with the tag end and standing line.
Remove the line off the cabinet knob with your left index finge and pull away from your right. Then release the line off your left index finger. The two twisted lines will now twist together making 4 twisted lines. Tie a surgeons loop near the tag ends, and snip off the tag ends.
Cheesum rice, I'm gonna take a video. This sounds too complicated.
After you're done, cut your tippet to length and tie a regular surgeon's loop in the other end.
When you loop to loop the wire to tippet , you may want to go through the wire twice with the mono loop to get it to cinch up nice. You can search "cats paw" if you've never done that.
PS. I don't count the twists, I just do it by feel, so if the loop is too small, don't do so many and if it's too big do more.
Edit: Wow a bunch of good responses while I was dicking around getting a video. Albrights are good, but not as fast as loop connections, and flies don't last long with cuda, and the wire will be mangled and kinked after the first one. If you are tying your own, put some flash in them. Cudas love flash and speed like Flatslander said.