Here we go again!
Same model/SKU but wiring depends on the version date. 3-wire (newer) and 5-wire (older).
If one has the older 5-wire version, you can convert it to 3-wire (insulated-rail) operation with a relay as discussed in this contemporaneous OGR thread. Per the linked thread, the relay will set you back between $1 and ~$25 out-of-pocket depending on how much soldering, wiring, hair-pulling, etc. one can tolerate.