Pin naming clarificaton

How to give pin name? please tell me anyone.
datasheet link: http://www.comchiptech.com/cms/UserFiles/Z4DGP406L-HF%20Thru.%20Z4DGP410L-HF%20RevA.pdf

I would use:
PIN# PIN Name
1 +
2 ~ or AC
3 ~ or AC
4 -

@haroldocalvo hi, patryk.laskowski told

Pin 1 = +
Pin 2 = 2
Pin 3 = 3
Pin 4 = -

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