I have a SA doser 2.1 running with a KHD and another slave doser 2.1.

I'm not the greatest with connections and stuff, it took me 3 days to get this setup running .

Now i'm going to buy a new profilux 4e starterset. I watched the install video (profilux 4) on the GHL youtube site.

When do in connect the profilux 4e with the pab cable to the SA doser and when do i have to make it a slave in the installing process?
Any tips or links would be helpfull.
I don't won't to ruin the current setup, i'm glad it's running ok .

thanks in advance for the tips and tricks.