Thanks Leroy. I went home for lunch to look at it again. The dirty white sheet is indeed running up to the masthead sheave and down the mast. The original jib halyard is there but not used. That ubolt was not installed when I got the boat. I believe it is supposed to go up into the masthead with the nuts tightened down on the raise piece (ubolt loop under the masthead). I stuck in in that way and it fits. That raised area looks to me like it is designed that way since the short leg of the "L" is welded to the masthead and gives a flat surface for the ubolt nuts. That's why I think it needs to be intstalled 180 degrees. Thanks again...I am sure I will have more riggings questions since the PO never had her in the water.