It's just an arbitrary connector somebody picked, probably
this was originally a component for some larger system
where it made sense and now it's overstock on the Internet
bazaar. You could replace it with some other connector
type (crimp connectors from AMP, Molex, et al) or just
solder it up, whatever you want. If you go to some place
like Digi-Key (or any major electronoic distributor) you can
waste a day poring over connectors. Probably the single
largest category.