Thanks for the help. With shaky hands and a little time, I was able to pop the light out of the housing. I was hesitant to do that earlier, since it looked like the white goo used to hold the halves of the glass/reflector together was actually holding the glass into the housing. I'm happy that's not the case.
Lo and behold, on the edge of the ring that holds the bulb in place, another spade connector for the ground wire.
Looks like I have a project after all. I read that I don't need to use the relay for the 55W light bulbs, so if I don't get the instructions by Tuesday, I may try that.
Do your lights have the Hella mount point, or do you have some special bracket? I'm wondering if the Hella bracket is beefy enough to keep the light from vibrating. There are brackets available from rallylights.com, but I'm wondering if I need it. I had some fogs on another car that weren't solid enough, and it drove me so nuts, I never used them.
Can these be mounted inverted?