Gday Arthur
If you want to make an extension cable for a 497,
The simplest and cheapest way is to use a cat5 patch cable with a joiner to connect it to your coiled cable.
They make two types of joiner, crossover 1-1 or straight through 1-8.
you need to get the right one ( its a crossover 1-1 IIRC ).
Doing this allows you to keep the pin polarity correct
Andrew
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