mast to boom?

Well, the boom on an Old Town lateen rig is usually held in place with a bronze jaw that is screwed to the boom as shown below. The screw heads are commonly covered with a twine wrap. See https://www.wcha.org/forums/index.php?threads/10672/ for some pictures. The halyard connects the yard (which is occasionally called the top boom since it is the same size as the bottom boom in a lateen rig) to the mast. This is frequently connected to a screw eye in the yard. I use a clove hitch around the yard if I want to retain the option to easily adjust the attachment point. Let me know if this doesn't answer you question or you want more details.

Benson

 

The "two booms" (i.e. bottom boom and top yard) are usually attached with two bronze eye bolts and an "S" hook. The picture at https://www.wcha.org/forums/index.php?attachments/24819/ shows the jaw above holding the boom to the mast. A lashing or knot at #11 is not commonly used. Let me know if this isn't clear,

Benson