Finally got to fitting these, I already had the dummy headlight switch replaced with a real one off a Triumph Trophy 900 and the associated wiring mod, so I could have just the DRLs on and look cool, until it was time to switch on the dip or full beams.
Also made adapter plugs for the A9830104 Bonneville Bobber lamps, so I didn't have to hack up the cables on them or the Rocket harness.
A9830104 wiring is;
Black - common negative
Red - positive dipped beam
White - positive full beam
Yellow - positive DRL
Blue - N/A
Roadster harness plug wiring is;
Black - common negative
Blue/red - positive dipped beam
Blue/white - positive full beam
Yellow - positive DRL
Plugs, pins, seals can be got here;
Complete adapter (need one per lamp)
Looks before
Looks after
DRL
Dipped beam
Full beam
Pose downtown
DRLs in the daytime