And what is a "lug"? Most cameras have a thing with a hole in it into which a ring is inserted, and it is called a lug. On the LX (and the medium format Pentaxes) a post projects from the body and is usually called a lug, while the swivel part that attaches to it, and to which the strap is attached, is also usually called a lug. Oy.
I think the Hasselblad type strap will fit the Pentax 645 and 6x7 format bodies but not the LX.
I do use a digital device in my photographic pursuits when necessary.
When someone rags on me for using film, I use a middle digit, upraised.
One of my LX bodies didn't come with the original Pentax clip on strap clips, so I purchased the OP/Tech Super Pro A strap which attaches to the bare metal lugs on the LX body. This strap also fits Hasselblad 500 and 503 series bodies (if not other Hasselblad bodies).