SFC1000 alternator - paired blue/white and yellow wires - what are they for?

As a no-electrical type of person (can follow wires on a wiring diagram) In the process of reassembling the bike having dismantled it about 3 years ago, I'm just putting the wiring back in place and find that the yellow and the blue/white wires from the alternator which go to the regulator/rectifier have been paired up but don't appear to have anything to connect to and wonder why they are there?

When I bought it long ago it had a DMC 1 ignition system & later on replaced to with the later optical system, these don't appear on any wiring diagrams & wonder if the connectors had anything to do with a previous ignition system or suchlike?

Any suggestions,

Also being a pilloc, forgot to put the earth which went under the battery tray, now looking for another location as I don't want to take it out again!

They are just duplicates of their color coded mates. They are from the three phase alternator and go to the regulator, ignore the duplicates.

I cant see my bike right now but I think I ran this ground to the crankcase breather bolt.