Thanks for an interesting thread Utopia.
Out of passing interest, I removed what I assume to be Xenocide's little hook up for his diode conversion, earlier this year.
Tell the truth I was a bit over zealous with the old clutch and brake cleaner, and melted all the glue off the insulation tape that was "hiding" the redundant mod. (It will be the diode that you have, that came from here?)
So I took a photo before I trimmed it back and made good with heatshrink and fabric harness tape.
Sorry I don't know where the blue cable comes out at the other end. I can only assume that it was threaded down the harness with a darning needle or some such.