Watch the video to see how it works in action here:
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Step 1: How It's Done..
After designing the jack, and 3D printing it, put a drop of a glue under the magnet, then insert the copper sheet and bend it in both ways as you see in the pictures. drill a hole where the screw should go (in the copper sheet) Use metal M3 screws to fix the wires that you will connect..
This design is for a 1mm thickness/5mm diameter magnet.
If you want my STL file of the design, just drop me a comment.