Does anybody know the battery pinout on the logic board?

I've somehow broken the battery connector on the logic board. i noticed that there are 4 pads underneath but i didn't managed to figure out wich one is what.

After some test i noticed that the 2nd and the 3rd seems both positive and the 4th seems to be the negative. But i didn't figured out where should i connect the two I2c pins (sda,scl).

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