Various connection interfaces are disclosed. In some embodiments, the connection interface includes a receptacle and a connector. The receptacle can be configured to be positioned in the wall of an electrical device. The receptacle can comprise a first set of electrical contacts and a channel. The connector can be configured to be matingly engaged with the receptacle in an engaged state and to be separated from the receptacle in a disengaged state. The connector can comprise a second set of electrical contacts. Some embodiments are configured such that angled surfaces of the channel and boss interact as the connector is moved into engagement with the receptacle. This can guide the connector into the receptacle such that the first and second sets of electrical contacts are in electrical communication with each other.