Saw this already yesterday and expected guys to jump on it to answer but no..
The most effortless and sure way it works is to find an Domestic muscle front signals controller and mirrors. hook up the original connector and done. But this is not really easy to find and also not a very cheap option... luck is needed to find one.
my way of doing this would be to get the aftermarket chrome/satin/black muscle mirrors and hook these up the signals. you may need an load equalizer because the tiny leds in these draw way less than the original incandescent bulbs and you will have a annoying fast flash warning and warning codes.
If that may be a option I could send you the links and I also could make a original connector for you with some wires (pigtail style) you can connect the mirror wires to. or cut your original wires. and also have a load resistor too you could try. (prob available at your bike shop too)
this setup is not having running lights and if I test out some here i could make that in it too for the yellowish lights in the mirrors. (there are some company's also making running light adaptors)
I also rebuild a few aftermarket (but oem also possible) muscle mirrors with yellow turn signal and white fading in and out white daylightdriving lights. the same two wire setup is used towards the mirrors and i put a controller inbetween the connector below. a setup i will prob make this winter again. need to change the controller and test some things for that.