An apparatus includes a substrate (102) and a connector (110) mounted on or to the substrate. The connector is configured to be physically coupled to an external component. The apparatus also includes a first electrical path (108) electrically coupling one or more circuit components (104) to the connector. The apparatus further includes a second electrical path (114) electrically coupling the connector to a terminal pad (118). The second electrical path is physically separate from the first electrical path, and the second electrical path is electrically coupled to the first electrical path by the connector. The terminal pad may be configured to receive, over the second electrical path, a signal provided from the one or more circuit components to the connector over the first electrical path. A presence of the signal from the one or more circuit components at the terminal pad may be indicative of a proper electrical connection between the connector and the one or more circuit components.