Do you know how to use the search function within the RV-12 forum? I always try that first- most times, I can get an immediate answer rather than posting and then waiting on a reply. There have been enough kits built that I now find that most RV-12 issues have already been addressed in an earlier thread.
The wht/blk and org wires in the optional harness are for future capabilities of the Dynon autopilot servos. They might be used with the Skyview or a future Dynon EFIS. Insulate them at the panel end.