I just put mine on this morning.
There were 3 push type fastenrs already attached to the spoiler. The fasternes that I bought as a part of the "kit" didn't fit in the first hole on each side, so I moved (2) of the push fastners to the first hole on each side (by the tire).
I simply started at each wheel opening by starting a connection where I wanted it, then went to middle center and attached it. The rest just tightened it all up.
I used a 1/4" drill bit.