How to read schematic: What is a connector?

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i googled it, still don't understand meaning.

quote from: https://learn.sparkfun.com/tutorials/how-to-read-a-schematic
whether it's providing power, or sending out information, connectors requirement on circuits. these symbols vary depending on connector looks like, here's sampling


precisely left example, saw before can't figure out stands for. mean wires (1,2,3,4,5 , 6) wired together? nothing else? or "real" electronic component?

it's connector 6 pins in single row.
the pins not shorted together


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