The instruction then say to measure out 150mm from where the plastic window trim start. There, put a strip of masking tape. The only purpose of this tape is to give you a rough idea on where the visors mount, but mostly so that it insures you clean enough area where the 3M tape mounts.
Repeat with the other side starting where the crack between the two pieces of trim come together with the length given by the instructions.
Just to show where about the visor will sit later.
