In the datasheet, there is a red square (see mechanical dimension/terminal configuration). What is it? Is it a pad? Then there is no dimension, pad# for it?
Did you review the datasheet at all? If it's intended for ground connection, it must be shown in the suggested PCB footprint, but it isn't.
Think! How do you know about the right component orientation? Obviously the red square is the necessary pin 1 marking. You can see it in the PCB photo.