Miniature Circuit Breakers Line/Load Contact Polarities

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Hello,

Noob question, please. I am new to the world of miniature circuit breakers and I'm trying to figure out if there is a contact polarity convention for the following two parts:
- A9N18367 C120N
- M9F22240 Multi9 C60SP

Otherwise stated, do the AC line inputs connect to the top contacts or the bottom contacts? I can't seem to find any convention information in the installation instructions or anything in the datasheets themselves.

Thanks in advance,
Chris

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