I've abandoned my fuge, and really don't recommend feeding a fuge with unfiltered water, but... Usually in the "fuge on the right" design the right side is also fed by the water from the DT. In this design the plumbing from the DT to the sump is Tee'd off and there is a gate valve so you can limit how much of the water goes to the fuge side. The remaining water is routed to the skimmer side of the sump. Unless I'm missing something, in your design there is no flow to feed the fuge.