The module communicates with the vehicle’s main head unit (Infotainment ECU) via CAN bus or LIN bus.
For a simple voltage divider: connect end terminals across your fixed supply (e.g., 0–5 V) and take the wiper as the variable voltage output.
For use as a variable resistor (rheostat): use one end terminal and the wiper; leave the other end unconnected.
If you are hand-soldering this through-hole switch onto a PCB: alps tb8163p3-bsp