my S200 had a 3 pin connector that I wasn't able to match up with an aftermarket flasher relay so I just cut the connector off the wires and connected the 3 wires from the scoot to the 3 wires on the flasher relay. Here's a few pics of mine (OEM) that I found.
That's the same problem I had with my Kymco; the 3-wire LED flashers are hard to find, and the "how-to" info is equally scarce. If you're able to tell us how you wired the new LED flasher into the non-LED Kymco wiring, it would be hugely appreciated!
PS: in the end, I simply wired in a pair or resistors (one for each side) since It appears that there's not a lot of energy involved anyway. By far the easiest solution.