SD Card librabry MEGA Sensor Shield V2.4

How can I use the Arduino SD library with the MEGA Sensor Shield V2.4 on a DFRobot Mega 2560? What SDCARD_SS_PIN should be used? the wiki is very lacking sadly :(

I tried chipSelect = 4, 8, 10, 53 in the SD CardInfo sketch but each gives:

Initializing SD card...initialization failed. Things to check:

* is a card inserted?

* is your wiring correct?

* did you change the chipSelect pin to match your shield or module?