Use a phillips head screwdriver to remove the two screws holding the battery cover down.
Lift the battery cover up.
Plug in the battery's circuit plug.
Lower the battery into bObi.
Tuck the wire into the side of the battery. do not push it underneath the battery itself.
When both are lowered into the compartment, replace the battery cover. Ensure it lies flat overtop the battery.
Reinstall the two screws to finish assembling bObi's battery.