Joe explains how to use the IK spline function to create rigging for a cable chain.
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Group all chain links and make sure they are aligned to the XYZ axes for proper rotation
Use the Skeleton>Create Joints tool to create a joint chain. Be sure to turn on Point Snapping to align each joint to the center of rotation for each chain link.
Use Create>Curve Tools>EP Curve Tool to create a curve with CVs at each joint. Again, be sure to turn on Point Snapping.
Create the IK setup by using Skeleton>Create IK Spline Handle
Bind the chain links to the joints by middle-mouse-dragging each polygon object into its respective joint in the Outliner.
Attach the curve to the “grabber” by using driven keyframes or by writing an expression:
chainCurve.translateX = (grabberObject.translateX / 2)
FK and IK Explained – Which One to Use and When? by Miloš Černý
Use Spline IK by Autodesk
Inverse Kinematics (IK) by Autodesk