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BQ4050: Identifying traces for this particular part shown

Part Number: BQ4050

Hello E2E Experts,

Good day.

 I'm trying to get a better understanding of what this is. So this is for the BQ4050 which is a battery gauge all in one system. Hi, I'm in the very early stages of designing a BMS. I'm having some trouble identifying how to do my traces for this particular part shown in the image. Is CHGND the chassis ground? The question really then is what physically is the item shown, looks like it might be a connector but idk.

Thank you in advance.

Regards,

CSC