No, it is correctly installed. The tang that is inside the motor case there is a ground strap. So the spring that slides on the drawbar transfers the ground through the metal body to the front truck assembly which then grounds the pilot truck wheels. Much better current path than just the trailing truck wheels. If you want to improve the trailing truck reliability to track, replace with a 1130 trailing truck. This has a different suspension system that works better. You can probably find on one Ebay sooner or later.