Ah, you misunderstood me. I also used the connector you show (AMP Superseal for reference - I made up my own plugs though as it saves another connector further along).
The connectors I am talking about are lodged inside the wiring loom you get with the DRL from Barkbusters. They are hidden underneath the plastic sheathing and they are rather poorly thought out.
The plastic bits slide off and create a short. Really annoying.
Fortunately I had a PDM60 electronic fuse block (reassuringly expensive) which meant I didn't chew through loads of fuses/get fed up and throw the DRL away.
I have some D2 Denali spots to fit to my bike (probably on the R&G crash bung mount) in addition to the LED headlight upgrade (6000 lumens
), the Barkbuster DRL, the LED sidelights and the BikeVis v2 bullets just under the headlights.
And the ebay seller you need is cyclemw_2010 although loads of alternates. I also added some thin black tape (the reflective pinstripe stuff) along the top of my DRL to prevent wasted light going up.