What Is This Unused Connector?

spaceman

Hi

If you open the BT3-X's case, then you see an unused connector close to the mSATA/PCIe sockets:





The connector is the same type of connector like the Battery connector, it also has 2 pins,
but it's not the battery connector, since that one is already used (not seen in this image)..


Is this maybe used for a BIOS Reset to Defaults?


Thank you