Centerboard line pivot? CS20.3

[NowWeTryItMyWay]

Hello - I'm putting together the centerboard trunk and had a question about the pivot(s) for the line that raises the centerboard.  

 

In the drawings, there is one pivot labeled Harken 243 block.  Then just below it , there is another thing that looks like a pivot, but it isn't labeled and seems to not totally make sense (I don't see how it would provide any benefit, and looks like it is in the way.)  I was wondering if this is a real thing or maybe just an artifact in the drawing?  

[Jknight611]

I have just the one block in mine.  I have a plexiglass cover over it, it will sometimes get a little water up there. 

[Alan Stewart]

I think that is a typo in the drawing, at one point we were playing with putting a block on the cb itself but decided against. There should just be the one block which is labeled. 

[NowWeTryItMyWay]

@Alan Stewart - Ok, great, that's what I figured but wanted to double check.  I figured it would be difficult to get in there to add another pivot after I glue the cover on!