The Housatonic & Cayuga has just acquired a Walthers HO Sperry Rail Car. The sheet which comes with the unit says "Depending on the time period, there may or may not be a coupler attached to the front pilot." My car has a front coupler, which fits my 1950's period. My question is should there be a rear coupler? There is a place for one, but it is conspicuously absent. Can anyone out there tell my track gangs whether or not they can sneakily attach a car to the back of the Sperry when it's making its rounds?