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I'd contact their support and mention that its not clear.
They may email you a dimensioned drawing or provide a link to
their CAD drawings.
Javier Martínez Verdú
It is really a poor datasheet for the pin layout.
You have three choices:
1) Buy the product and measure it.
2) Contact the company where you bought from.
3) Extrapolate from that design and others on the site and take a
chance. I did the latter based on the symmetry of the right 3 pins:
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