Position them on your hood, then outline them with masking tape. Then you will know where they go again when you pull them up to peel the protective later from the sticky tape.
This assumes that these have not been installed previously.
If they have been installed, it can still work to position them on the hood and guide you for after you put the two-sided tape on them before you install them.
Does this make sense? It's late and I may be a little loopy as my fingers smell of latex....... Because of filling 250+ Water balloons for an epic "WBF" tomorrow :-)