3M makes an adhesive tape for purposes just like this. I actually got mine from the clear bra installer who had it in his shop ( he suggested it). It is gray on color, maybe an inch wide. It's very strong and won't mess up the clear bra. Another option is a similar product you can get at Lowes. It's also 3M adhesive tape, but it looks red because of the film protecting the adhesive side. Not as strong, but easier to find maybe, and should work well. One roll costs about $10, more than enough for an ED plate.
2011 E92 M3. ED 10/5/11