A component assembly system includes a supporting profiled rail, a functional component, and a bridging module configured to electrically connect to the functional component. The bridging module includes a module retention device configured to hold the bridging module on the supporting profiled rail. The functional component is configured to partly seat onto the bridging module, and includes a component retention device configured to hold the functional component on the supporting profiled rail. A locking slide is configured to releasably fix a functional component to a supporting profiled rail. The locking slide is configured to positively engage around the supporting profiled rail.