I'll jump into the breach again. I believe pick posted above shows the slotted end mounting to the under body, which seems appropriate as the shorter length from the kink doesn't look long enough for it to clear the bracket cover. Also the suspension side bolt is like twice the size of the spoiler bolt bolt and I'm guessing it wouldn't go through the smaller hole.
QUOTE(rdauenhauer @ Jan 27 2017, 06:22 AM)
I think the brkt itself isnt to complex but the hardware is specific.
You might note on the OE spoiler the hole The "bolt" passes through is square.
The slotted end is the spoiler side & the slot dimension allows the sqr shoulder some fore/aft location.
The carriage bolt fastener shoulder is square to fit through both.
something like this: