a power interface operable to direct power from one of a first source and a second source to a load . the power interface includes a support plate , and a switch extending through the support plate . the switch is electrically connected to the first source and to the load and is movable between a first switch position in which power from the first source is directed to the load , and a second switch position in which power from the first source is inhibited from reaching the load . an electrical connector is electrically connectable to the load and is connectable to the second source to facilitate the delivery of power from the second source to the load . a movable cover is movable between a first cover position in which the cover inhibits connection between the electrical connector and the second source and a second cover position .