Get more control

Hi all,
i saw an unused connector inside the robot, called 9x or 6x.
there are 4 pins, it looks like a kind of serial connector (gnd, TD, RD, VCC). Any body knows what is it for and if we can get control of the robot throught it via an API?

This could be usefull to have a kind of scheduler, remote control or, via an external computer a graphical representation of the cleaning with "real" virtual walls.