The present invention is premised upon a through-roof connector assembly comprising one or more photovoltaic building sheathing elements capable of being affixed on a building structure, the photovoltaic building sheathing element including a sheathing element electrical connector along a sheathing element peripheral edge; a through-roof connector edge piece assembly that abuts a portion of the photovoltaic building sheathing element and includes: a body portion, an edge piece electrical connector, one or more wire leads that are connected on one end to the edge piece electrical connector; a wire guiding member with at least one conduit hole, the wire guiding member located under the through-roof connector edge piece assembly when assembled; and an under-roof junction device that is removably connected to the wire guiding member.