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Oh, as for how the pins are installed, once you crimp them, you jyst slide them forward until the metal spring flap locks into place. If it doesn't lock, you either have the pin backwards or managed to squish the metal flap while crimping (other crimper than the pa 09 are much easier to mess that bit up) you can lift it back up and bend it into place a couple of times with a hobby knife if needed. The housing has small square holes cut out in the sides if it, that metal flap goes in there.