Research said people were having better luck with this eBay H4 harness than the Putco harness, and at $19 I figured it might be worth a shot. But that box, though...
This tag is pretty awesome, too.
It looks to be assembled well, at least, and it has ceramic H4 connectors, which sure seems like a good idea.
Yes, I do keep a fire extinguisher in my Jeep. Why do you ask?