When #6 arrived at 6:30, it was then pulled out to the wye west of the tunnels. I don't know whether that switcher went to the other end of the train out there or not. The lights were turned off or low in the cars. I don't know whether the cleaners were on at that point or not. It was an eerie sight. AIR, the coaches and diner were turned for #7, The Westerner, that departed with a Nickle Plate sleeper at 8:05pm. Too, I think the #3 coaches the next morning were made up with inbounds from early morning #8 and #10.
As far as I remember, #3 was always placed onto Track 8. I don't ever remember the dining car being serviced in the terminal. Same for the liquid refreshments that were provisioned for the observation cars.
When I did see the train being backed into the terminal, it was usually with a switcher. The two E8s were backed in then connected up.
The departure of #3 was an event.
This is all 44 years of memory, so I welcome any clarifications and corrections.