Yes, the return outlets will be at the opposite end from the overflow box. I hope that works out because that is hellof-a-lot of travel :-)
The pipes are going to run up the side with the overflow box and then across the top of the tank along the long edge eurobrace until they meet up with the elbow and bulkhead at that opposite end. The tank is going to have a canopy to hide the pipes. Lights will sit on top of the canopy much like my current 90 gallon.
here is a highly detailed schematic of what I have planned. The red line is the return pipe. It will be 'T'ed off somewhere so that I can run one on either side of the long edge.
K.