Hmmm
Those are just plain bare pins with a 2.54mm (0.1") pitch.
You can get crimp and shell connectors for them, but there is nothing to protect against reverse polarity or anything to lock the connector in place to prevent accidental (or vibrational) disconnection.
It may well be worth removing those pins (if your soldering skills are up to it) and replace with a proper connector like the KK series or similar.
Be careful not to damage the through-hole plating when removing the pins though. It can be easiest to remove those pins one at a time - the plastic softens easily with the heat in the pin as you de-solder, and the pins come out of it one by one.