Execpt the DICE connectors, the BAM-Shield offers the same connections for the Arduino Mega1280/2560 as RAMPS.
For Arduino based pin assinment refer to the following picture:

All pins are compatible to RAMPS, so every existing extension can be mounted.

The DICE connector on the BAM-Shield shows following connections.

For the different pin assignments of the DICE-Connectors according to the Arduino please refer to the BAM-Shield schematics.