About this 3D model

You push in the front, until the tabs of the connector are pushed in by the tool. Then, through the hole at the back you push the connector through with a slim screwdriver. If the cable is still attached, you can also pull the connector out by it. you might have to scale the model up by like 5%, as most FDM printers print circles smaller than they should be. For Print settings i recomend a brim and Vase Mode for the best results. I used 0.2 mm layers but 0.1 mm layers can yield a better result frictionwise.