The sockets where the IV cables are connected to transfer power from the locomotive are present on both ends of the locomotive, not just one side. Both ends of the loco have power sockets with provision to connect to the rake. The switch for the Hotel load is also present in both the cabs. This switch is present in the non-HOG locos as well, but is inactive, and does not serve any purpose. Note that this switch is present in all the classes WAP5/7 and G9, irrespective of whether the loco is HOG enabled or not. This is because these locos originally came with the provision to provide HOG power. So , they had the entire circuit to provide HOG power ready except the Hotel load converter. In the original locos the switch was provided so that IR can easily upgrade the locos to handle HOG without any redesign.