Thank you for replying my question.
The first sentence is mentioned like that “a certain minimum distance is required between the noise source, filter components, and connector”.
In the upper sentence, the word ‘connector’ made me confused because I was wondering whether it was need to be close proximity with connector.
However, after I read to your mention, I understand like that "The filter circuit and control signal circuitry need to be in close proximity each other and be far away from the connector. "
Is it right ?