Thanks for the replies.
As Peteski suggested there is a screw holding the motor cradle to the loco plastic frame.
That screw is only accessible with the motor removed which is accomplished as JJB
suggested, snapping it out of the frame after all wiring is removed..
Motor installation is the reverse.
Planes and Trains model showat the Museum of Aviation Warner Robins GA Nov 19-26 - Thanksgiving week. 2022.