Page 137 - Knots You Need to Know Easy-to-Follow Guide to the 30 Most Useful Knots

1. To make fast with a cam cleat, haul the line over the center of the cleat

(1) and press it down against the tops of the spring-loaded cams,
spreading them apart so the line drops between them. When the cams
swivel back (small arrows) they bite the line and hold it. To let go the line
(2), tug it back and upward.