There's a walkthrough here on replacing the convertible top, and at one point it shows how to replace the cables.
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How To: Change the Convertible Top & Headliner
How To: Replace the Convertible Top & Headliner A Comprehensive Step by Step Guide for Replacing the Convertible Top and Headliner on the 2000 – 2005 Mitsubishi Eclipse Spyder Tool List: Screwdrivers T20 & T25 Torx Bits Scissors Wire Coat Hanger Staple Gun Staples Scratch Awl Pliers...