How to configure the stm32 for use on CELL02 board

[GHass.1]

I have a stm3214-discovery board (L496-CELL02) from ST. On this there is a BG96 module. It seems that the lines between SIM and some other are shared with BG96 and the CPU. I have found no information whatsoever on how to configure the CPU to have the module working. (In the end I cut some pins on the STMod+ interface - and this worket). But this is not a good solution.Any information on how to configure this card?

// GH