The datasheet of the Pysense 2.0X is available as a PDF File
The PyPort connector is for a 6 lead mini ribbon cable, part: Amphenol 20021511-00006T4LF. The external IO header power pins are labelled as follows
The board features a single cell Li-Ion/Li-Po charger with a JST PHR‑2 connector. When the board is being powered via the micro USB connector, it will charge the battery (if connected).
Make sure you check the polarity of the battery before plugging it in! Connect the positive side to the side marked with a