The question is based on the quote from the manaul:
"Power User Tip:
Use these outputs in conjunction with ADAT input(s) to expand the analog outputs of your audio
interface for monitor mixing or speaker switching. By wiring the ADAT output to the ADAT input, you can also use
the DAC and Direct Analog Outputs to create an analog split of your eight input channels. See Section 2.3.3."