The SV-HARNESS-ADSB and SV-HARNESS-XPNDR ship with documentation in the package. There will be documentation of the SV-HARNESS-ADSB (and the SV-HARNESS-XPNDR) in the next revision of the SkyView System Installation Guide.
Both come with the connector prewired, but there is no connector on the other end - just unterminated wires like the SV-HARNESS-D37 for the SkyView display.
To use Serial Port 1 for the SV-ADSB-470 for two displays:
* Connect the Violet wire of the SV-HARNESS-ADSB to the Brown/Violet wire of BOTH displays.
* Connect the Orange wire of the SV-HARNESS-ADSB to the Brown/Orange wire of BOTH displays.
(I used Serial Port 1 purely for example - you can use Serial Ports 1, 2, 3, or 4 for the SV-ADSB-470.)
Use whatever wire-to-wire junction method you prefer - crimped butt splices, soldered and heat shrinked, solder sleeves, etc.
I see there is a new ADS-B Harness available but don't see any documentation in the latest installation manual or picture of it. I assume it comes with the DB9 connector for the module side but how does it work on the display side if I have dual skyview displays?