Classic said:
I did use 2 holes and it is secure but now I have 2 holes from the plate and I did not like the idea of showing these holes. It is just odd they only use 2 holes when license plate has 4.
Ah, this is one of the reasons I used nylon mounting hardware. I didn't want the "empty hole" look either, so I used two of the nylon bolts full-length to mount the plate/frame assembly to the car. For the other two holes I used the nylon nuts that came with the hardware to join the plate and frame, then I cut the bolts off flush with diagonal cutters. Final step was sanding down the sharp edge on the bolt and covering with duct tape applied to the back of each license plate to prevent marring the paint surface on the hatchback.
I also used those hardware-hiding plastic caps that consist of a cup washer that goes under the bolt head and a "button" cap that snaps onto it after the bolts are tightened. Since I have a black license plate frame, the black buttons on each hole make the mounting hardware practically invisible. They also come in plastic "chrome" finish and other colors.