I am trying to mount some landscaping lights through stucco on a patio cover I built and not sure what hardware to use. The structure is wood cover with about a 3/4" (approx I subbed out the stucco part) rough coat and acrylic stucco. I am mounting the downlights in the picture which have a cover that goes over them. Do I use some kind of anchor or just screws and predrill? Any help is appreciated.