In various representative aspects, an assembly for connecting and electrically bonding two solar panel rail guides. More specifically, the assembly provides a splice that slides within two solar panel rail guides and includes an elongated spring element that is inserted into an elongated slot in the splice and enables the two solar panel rail guides to be electrically bonded together when various bonding techniques are used to allow portions of the spring to penetrate the oxidation layers of the inner surfaces of the rail guides as they are joined together. Another embodiment that utilizes a bonding element that is inserted into an elongated slot of a splice and also enables two solar panel rail guides to be electrically bonded when the rail guides are joined.