Ok, need some help here

Have a stdl4 Powerbar connected to s1-s4
Have a second stdl4 Powerbar connected to s5-s8
Have a 5.1 Powerbar connected to pab

Then my first doser gen1 is connected to the S-port on the side and works fine
Now I want to connect a second gen1 doser to the first, only I can’t seem to get it working.

Any help on programming and/or connecting would be apreciated (step by step please )