[MakTheo]

Here I present you the measures you have to take if you want to drill the plexi

First of all you have to mark the middle of the plexi to get the symmetry

1. Take some paper tape (yellow or white) and put it over the plexi about the middle (as you see it) (because the plexi is black and you wont be able to see the marks you 've to make)

2. You measure the rear central stop light (total width is 62 cm), and you make a mark with a pen (use some paper tape to see your mark), from the start of the rear light (start of red) to the middle (31 cm)

3. Take a ruler (or something direct) and put it over the mark you make in step 2 and put the other end in the vertical line in the rear window of the car (heated glass) and draw a line with a pen across the mark (in step 2 and the vertical line in the rear window glass) .

Now you have the symmetry you want

Now follow the drawings below in the photos to see the measures you have to take (photos 3,4 shows the exact measures, as you see the plexi from the up (ground plan)).