Another thought...to avoid cutting your original cable you could cut a very thin vertical slit along the entire length of the replacement nylon adjuster.

The split adjuster could then be installed on the cable without cutting the cable
and I believe you should still be able to change the adjustment.

I would try this method first.

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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022