There are actually three possible ways (at least) of doing it:

1. Fit BB30 bearings and get the Wheels Manufacturing adaptor for Shimano cranks;
2. Fit a FSA press-in sleeve and then screw in standard Shimano external bearing BB cups ready for the crank;
3. Use the KCNC adaptor cartridge that presses into the BB30 shell and has built-in bearings.