Nick... there is a metal bracket back there.... i just made sure I didn't drill through it. There is space that is just plastic. Those Ozniums are the same light I used. And I just superglued a little black plastic cap... (don't remember where i got it... but had one hanging around) ... because if I didn't, even with the right angle light, like the ozniums, it had a tendency to shine their brightness into your eye... I didn't want any "direct" light.