Page 40 Modeling a Sailboat: Rigging / Lines and Stays

Zoom in on the lower left corner of the main sail and copy the block to the positions shown above.

From the top view drag the block up to meet the polylines on the 'sail curve' layer as shown in progress below

Copy the left block and drag it down next to itself as shown below.

 

Make Pipe(s) from the polylines with a 1 unit 'Diameter'. What you're going for is the appearance of the lines going through the blocks. It may not look perfect, but unless you have a camera close up you won't notice it.

Copy the last block and drag if forward to the other bar that goes across the front of the mast as shown below.