About this 3D model

This is a socket to <7mm power supply plugs, like you would know it from your normal laptop (not apple). I often run into a problem that I want to connect something to a power supply but I do not want to solder a socket for unimportant testing. There are two wire ports, one on top for the middle-connector and one on the side for the side-connector of the plug. You can switch polarity as given by the plug. To stabilize you should use an M3 nut and screw like in the pic.