If it is desired to connect battery cells to the SB200 that does not fit in the sockets, these can be placed on an external board and connected to the SB200 test/connection points at each of the battery cell sockets (see Placement of hardware modules on SB200 (areas within silkscreen rectangles/shape).).
These connections points can also be used to connect an external power supply instead of batteries. This can be used to more easily and safely test how the smart battery implementation reacts to extreme voltage/current conditions.
If working with cells that fit in the sockets these test/connection points can be used to measure the voltage over the battery cells.