see it clearly

Slings

This is simply the bight of a rope turned up over its own part; it is frequently made of chain, when a shackle (bow up takes the place of the bight, connecting the two ends with the part which goes round the mast head. Used to sling lower yards.

Sling illustration

For boat’s yards it should be a grummet with a thimble seized in at y. As the tendency of all yards is to cant forward with the weight of the sail, the part marked by an arrow should be the fore-side - easily illustrated by a round ruler and a piece of twine.

Sling tying illustration