A method is disclosed to ensure that components in a complex system are correctly connected together. In one embodiment, such a method captures a visual image of a system made up of multiple components connected together with cables. The method analyzes the visual image to determine connections between the components. The method further builds a current model that represents the connections between the components. This current model is then compared to a previous model to find differences between the current model and the previous model. If differences exist, the method notifies a user of the differences. This may assist the user in identifying any incorrect connections between the components. A corresponding apparatus and computer program product are also disclosed.