Presonus 1818 vsl and digimax D8 syncing ?


i have bought the 1818 vsl and the digimax D8 to combine them to get a total of 16 xmas inputs.
this is where i need your help…

When connecting the interfaces to each other with the adat in and out and setting the digimax D8 's clock source to external . what configurations must be made in Cubase to allow the interfaces to work flawlessly ?