2015 X-Carve Gantry Side Plates and X-Carriage will not work with this upgrade, as they are missing the hole pattern to attach the drag chain brackets. The latest version of the Gantry Side Plates can be found here. The latest version of the X Carriage can be found here. Note that the latest version of the X Carriage also lacks the mounting holes for the terminal blocks as the latest version of the X-Carve includes connectorized motors, so you’ll need to find an alternative way to wire the stepper motors or attach the terminal blocks.
This plastic chain is designed to organize and protect your wiring as the machine moves. The chain is comprised of individual links that swivel in one direction. An open-close feature running the length of the chain makes organizing and accessing wires easier than ever.
The above links take you to the section of the X-Carve instructions in which the drag chain components are first mentioned, attaching to the side plates. Subsequent drag chain installation steps are found in the X-Carriage, Assemble Gantry and Wiring sections.