Spoiler mounted chase light question

i know im 2 years late but did you find out what screws/did it work?

 

OP stated he had no information into what size screw he used. Pulled a few from his overflow bolt/screw box before finding one that fit.

 

Double sided 3M tape mounted away from the wiper blade on the spoiler to see if you need to drill, where to drill and the better idea that will come from it. If there's a problem with it, it won't be permanent yet until the better idea arrives.

 

Check out their items.
https://www.ledfactorymart.com/collections/toyota-4runner-2010-2025
I got my grille from them and 4th brake light emblem from Ebay. They have some nice stuff and brackets.