Wrap the loose end of the line around the cleat just once and then pass it thru the loop that you made above the cleat.
Photo 33 Trucker's hitch
When you pull down on the loose end, you will get a 2 to 1 power advantage (For every pound of pull you put on the loose end, you will get a 2 pound pull on the halyard). When the mainsail is up, secure the loose end to the cleat as shown at the beginning of these instructions. The front edge of the sail should be stretched tight, but not so tight that vertical wrinkles appear in the front of the sail.
Run the rope at the rear end of the boom thru the sail and tie the line tight to the cleat at the end of the boom, as shown in Photo 34.
Photo 34 Mainsail attachment, lower rear corner
For light winds, the sail should be full and somewhat baggy along the boom. As the wind increases, the sail can be flattened for better efficiency by tightening the hoisting and boom end ropes. A common error is not having the hoisting rope tight enough. However, don't get it so tight that the sail has long vertical wrinkles along the mast.
FORWARD (JIB) SAIL
Attach the forward corner of the jib to the hole in the foredeck fitting, using 2 shackles as shown in Photo 35.
Photo 35 Jib sail, forward lower corner
Clip the jib to the forward mast support wire with the bronze snaps on the sail, and tie the jib control line as shown (Photo 36).
Photo 36 Jib sail, control line attachment
When the jib is raised, use a trucker's hitch. Get the hoisting line really tight. Secure the hoisting line to the left (starboard) cleat on the mast.
When sailing, there should be no scallops or sagging between the clips on the jib sail. A loose leading edge is a very common error and hurts the boat's windward performance.