The fastener guide doesn't list any WP bolts having an LE marking. They list the 4 long bolts as having an F with a circle around it. The bottom two bolts are listed as having an A in the center.

My 73 had two of the F bolts and two with a D. The other two lower bolts have a TR on the head.

The fastener guide says that 1 loose washer goes on the lower left bolt.