Hi guys. Here are my two cents.
The splitter has 4 holes (see pics) that fit the bolts that hold the M Tech front bumper.
Never used the 3M tapes for my carbon fiber pieces (just don't trust the tape), applied a strong silicon sealant through the perimeter and contact areas. It works great holding the splitter firmly and securing the front, top and side edges from water, snow and dirt.
Bottom side of the splitter is 1/2 inch deeper than the screen and it is open backwards so it can breath and dry.
Conclusion: 4 existing bolts + silicon sealant. Splitter sits perfectly and firmly for 2 years of all-weather.