The IBM Model M is great, but the little clips on their SDL cables tend to break. Once this happens, the cable doesn't like to stay in the keyboard. Replacement cables are really expensive! Instead, this clip slides over your connector and screws into the nearby hex screw, securely keeping the cable attached.
This part fits snugly! It might be difficult to get the clip in at first, but once it's in it's very secure. A 5.5mm hex driver is required for the screw (which is the normal model M size). I've included the F360 file in case you need to make changes. STL cables have somewhat loose tolerances so you might need some tweaking or ±~1% print scale to get this to fit correctly for you
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