[Al Skierkiewicz]

prifken,
phil was telling you that the CAN buss wiring can loop back to the PDP to allow you to use the termination there. The physical location does not matter as long as the last point in the chain is terminated.
The single biggest problem for CAN use in the past has been teams making an error in the termination resistor. The buss is actually a 50 ohm buss terminated at both ends. The RoboRio supplies the first termination and the PDP gives you a convenient second termination. Since the PDP has to be connected anyway, you might as well just add the few inches of wire to get the CAN buss back to the PDP as the last point in the chain and use that termination. CAN buss wiring has little loss so it is not like power wiring where you want to make it as short as possible.