The hardware received was different from the photo (photo is a 4 PINs the item has 5 PINs)
There was no wiring information for this switch. I spent several hours to locate a similar switch (KJD22213) that had wiring diagrams, in order to understand how to produce the latching behaviour. Basically, the small pin needs to be connected to pin 4. The vendor insisted the switch was non-latching. The switch itself seems to be well made.