Although it is possible to control individual parameters to the Matrix via Sysex, there is no way to read out parameter values. It's just not in the firmware. 

So the only way to show the actual values of the parameters is to send the Sysex command that makes your M6 dump its complete edit buffer, and then analyse this 175-byte transmission to read out the individual values of the parameter. I guess that this is beyond the BCR2000 - it would have to know the memory structure of a preset for that.