I have to be honest. I never saw one made without a shift actuator. It should be on the passenger side of the axle facing toward the rear of the vehicle.
I attached a pic below of the shift motor on the axle. It is operated by engine vacuum, so if you locate it, disconnect the vacuum hose, start the engine, and see if there is vacuum present.
Let me know what you find.
See pic below.
Thursday, April 8th, 2021 AT 8:52 PM