For some reason, Apple cables still need a relief otherwise they end up opening up.

This print retains the cable and doesn't let it move around the socket connection. It is for Macbook Pro magnetic cables but with the provided Fusion 360 file, it should be quite easy to adapt. If you can't be bothered by that, just give me the dimensions of socket and I will provide the extra dimensions.

To apply, just push the cable onto the slot and pull the socket to his resting place. 0.5mm has been given for higher tolerances, which means the socket will slide quite easily. If you require other tolerances, you could change them on the Fusion 360 file or just ask on a comment and I will provide it.