AD9176 SYNCOUT

When using AD9176 in both single-link and dual-link mode therefore need two SYNCOUT signals.

The data sheet mentions possibility of combining two SYNCOUT signals in dual-link mode inside the DAC (register 0x110, bit 6); Will the combined SYNC signals be outputted on SYNCOUT0 or SYNCOUT1

Please provide additional information about combining the two SYNCOUT signals internally.