I JUST WENT THRU THIS SAME PROBLEM WITH A REPLACEMENT HARNESS,,,SPLIT THE FUSE BLOCK IN HALF AND YOU MOST LIKELY ARE GOING TO FIND THE NUT FLOATING AROUND IN THERE,,,,IT HAD A INSERT THAT LOOKS JUST LIKE THOSE STAMPED NUTS THAT ARE USED IN FURNITURE,,,,NOT CLOSE TO ORIGINAL,,,,I TOOK SOME EPOXY AND GLUED IT IN THERE,,, I USED A BOLT TO HOLD IT TIGHT WHILE IT SET UP,,,,WORKED LIKE A CHARM