You will find the eagle files and the BOM on GitHub.
There are two versions of the BI1 board:
BI1Rev4: Early version of the board – the vibration motor and the LiPo must be soldered (no connectors).
BI1R7: latest version, vibration motor and LiPo are connected to the board with JST SH jumper.
Schematic
Top side
Bottom Side
body interaction 