CubeCell Capsule and a battery

The datasheet stated: solder pads for a battery.
I would like to put a little lipo battery in the upper half of the capsule where the mcu and antenna is but i can not find any Information where to solder the battery at.

Oh, sorry to notice your content.
Below is the battery interface of the capsule.

Wish you have a nice day.

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thank you.
now i can use the capsule with an HDC1080.
CCS811 and BMP280 are in beta state wight now