I am trying to remove the boiler and cab from the chassis to gain access to the wiring in the engine. I have removed the screw from the cylinder saddle that goes into the stack and the 4 screws (2 on each side) from the firebox. The chassis still seems to be connected to the bottom of the cab and I cannot find anymore screws to remove. What is holding the chassis to the bottom of the cab. Is it a pressure fit that has to be pried apart or am I just blind and can't see the connection point? The engine is the Rio Grand Southern with the rear driver directly under the cab. I do not know the vintage of the engine.