MyLaps are still using CAD images, though you can kind of make out a white wire in one picture of theirs.

But, at least two HK based shops now have new RC4 stock, and are showing actual pictures which show they have three wires.

I'm not real sure I like the idea of three wires on the new transponder, considering I often cut down my wires and/or slip them into a tight space, it's just more work with an extra wire, though I'll admit it's a minor gripe.