This page gathers some of the Go2 internal photos shared by Go2 owners on the discord. If you are the original owner of any of these photos and would not like to see your photos posted here, please comment below so they will be excluded at the next revision.
Ethernet RJ45, S-BUS (aka SBUS, S.SUB), XT30 are hidden under the rear anchor plate for the strap. Take out two screws holding the strap plate using a 2.5mm hex wrench.
Pinout for S-BUS. According to Unitree tech support, S-BUS only accept 3.3V. If you plan to connect it to a RC receiver, make sure signal does not exceed this limit.
The XT30 port may be used to provide power to external modules, and seems to draw directly from the Go2 battery. According to Unitree's technical document, the output voltage should be 28.8V. According to @legion581, range for the output voltage may vary between 24V to 33.6V depending on the state of charge. Make sure to factor in the potential wide range and use high quality step-down modules when converting to a lower voltage.
There is a reset button right by the S-BUT port hidden underneath the foam liner.
Type of data connectors on the main board
Those white connectors are JST GH1.25 headers and are very delicate. Use extreme caution when unplugging, make sure to clean off the glue, otherwise they may be pulled off the PCB.
Mini PCI-E slot is not utilized on the Go2 Air. A USB port may be added with an expansion card as shown above.
Disassembly of the battery (standard version)
Go2 disassembling videos from Questionable Engineering
https://www.youtube.com/watch?v=ErYni1dtj8k
https://www.youtube.com/watch?v=mXTWTJvlo7Q
https://www.youtube.com/watch?v=PrIXIcXMEIE
https://www.youtube.com/live/c-lp-QEnIo0