Component Description: SCCM
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
The clockspring and SCCM are the interface between the BCM and the horn switch contacts. The clockspring, which mounts to the directly to the SCCM, allows the steering wheel to rotate while maintaining circuit integrity with the electrically monitored/activated components mounted to the steering wheel.