Quote
I also suspect the red, black, and yellow wires are connected to an internal pot.
I think the KAT may be right. I saw a reference to a "Pot" for the "Controller" they want you to buy to run the actuator.
After reading the data sheet, I don't agree. There is a section that says "Hall", lists the red wire as Vcc+ and lists the yellow wire as pulses. That is not consistent with a pot.. So, I do think there is a Hall sensor that counts motor rotations or some fraction thereof. However, they give no information about the resolution, so positioning would require calibration (and it would not be absolute).
You can buy much cheaper linear actuators with absolute potentiometer position readouts at Pololu.