Use MR816CSX to record Cubase AND Tascam DP24 same time

Hello,
Many thanks for the valuable advice!
I purchased a splitter box from ART, the S8-3way.
Connecting and setting up the routing was easy, using multi cables.
The recording went well, … and I 'll end up by editing in Cubase and mastering in Wavelab.
Thanks again.
Stef