Is correct?
No.

Group 1:
L1/L2 1x splitter with 1x tunze 1 + 1x tunze 2 + L5/L6 with 1x tunze 1

Group 2:
L3/L4 1x splitter with 1x tunze 1 + 1x tunze 2


However, needed cables and splitters are the same.