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Those holes are just for access to the nuts/bolts.
Basically, the socket will go through the lower holes and the nuts will connect between the second piece of carbon/front bumper. You *will* have to drill the front bumper for the nuts/bolts.
I'm not sure of nut/bolt size... but think small. You should be able to measure the top piece of carbon to figure it out.
For the record, it would be a complete PITA to do on your back, especially alone.
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