Kaizen

So I'm just about done sealing both headlights. I'm curious as to which wire would be best to tap into with the trigger wire. The installation paperwork provided by umnitza suggests tapping into the "accessories wire" but I'm not sure where to access it. Also, is there a preference as to which trigger wire to use (there are two of them). I'm pretty sure that it doesn't matter, as long as I tape up the other unused one. Just hoping for some confirmation from the professionals here.

Thanks!

EDIT: I probably should mention that I'm looking to wire it as DRL or as parking lights (where I have manual control of when to turn them on). Whichever method is easiest is probably what I'll go with.