Drew a locating line spanwise .45 inches aft of the front spar joggle. Drilled a #40 locating pilot on the intersection of that line and a projection of the inbd rib fastener line. Loaded and pinned the LE skin to that location. Aligned the pilot holes in the LE skin along the aft edge wint thespanwise line drawn on the fwd edge of the aft skin. Clamped the skin down on the outd end and taped down as required.