You can reuse your old connector housing.

use an ice-pick, or an awl to push down on the pin's tab. Then you can easily pull the pin out by the wire.

Clip off the old pin, strip the end, and crimp on a new pin. Slide in until you hear the click.

Do this one at a time. I like to mark with a felt-tip pen the unpopulated spaces, so as not to lose track of which pin goes where.