as i already wrote.

The H8000 see the Muxed Signal in 1-2 & 5-6

That means , for the routing in the H8000 you have to patch the 

ADAT 1 -2  and the 5-6 to one Stereo pair in the MAin in put ( maybe 1-2 ).

and versi versa out .

The Main out go to ADAT 1-2 and 5-6 out.

This the routing with the RME 800 i am working here.( Via Adat )

Don´t know the other Interfaces.

Anyway , be carefully while changing between 44,1 /48 and 88 /96 !

You get Routing Problems in Logic .