To remove the cable chain, you must cut a few more cable ties and remove some screws.

Cut any cable ties securing wires to the cable chain.

Remove the M3 socket head screw with a M2.5 hex wrench.

Loosen the M3 socket head screw to align the T Nut with a M2.5 hex wrench.

Remove the M3 socket head screw and T Nut and set aside. They will be installed on the new chain soon.