Solved
how to connect CAN pins to DB9 connector on "AEK-AUD-C1D9031".

The connections in the picture is ok or should, I want to change any thing.
(note: is it necessary to connect GND to the DB9 connector).

The connections in the picture is ok or should, I want to change any thing.
(note: is it necessary to connect GND to the DB9 connector).
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