They did the same on my front plate, they installed the dealer plate frame with my tag and just put 2 sheet metal screws through the plastic. I took the dealer frames off and just mounted the tag without their advertising, but the holes were getting slightly wallerd out. I don't think they have any kind of mount for the front plates, at least there is no hardware that I could see for the screws to screw into.
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Bryan
Tomball/Spring, Texas
2007 Toyota Tundra/DC/5.7L/Sport/Texas Edition/Back and Black/Volant CAI/ BHLM
2002 Chevy Tahoe 5.3L/Black
1995 Toyota 4runner 3.0L/Dark Grey -Sold
2005 Kawasaki KLR 650 A19 Dual Sport bike/BedLiner Black