Damn, looks like they've sent you the wrong bulb ... or at least the plastic surround that holds the bulb and fits into the headlight assembly.
Did you order an H-4 bulb? You can see (look on my TT tutorial) my bulb and plastic surround fitting are different to the one you have.
I was able to reach an actual person in the San Diego area at DDM Tuning.
He sorted out my order when I returned the high/low system. Maybe someone there can help. I think I got the Boss: Chinese American, probably a Berkeley or UCLA grad. Sharp.