Here is a Williams 47078 O Missouri Pacific 40' "Herbie" Box Car

and complete instructions

because they not only show prototypical signal aspects

needlepoint axles

Atlas 0322 HO Universal Panel Connector DCC System ProductID_11460825 Here is a Williams 47078This connector is the ideal companion to your DCC system. It provides a simple solution to connect your Atlas HandCommand or any other XpressNET compatible throttle to the Atlas Commander (or other command station). The wires and cords are all included and it mounts easily on your layout. It has a LED track status indicator lamp and includes detailed instructions. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9)