Whiffle Tree Pulley Cable Retainer.
Used to retain two lift system pulleys. The application for this pulley retainer is at the cable routing just past the whiffle tree. Typically 2 pulleys are stacked one on top of each other side by side between a plate. See photo two.
This common cable routing system is found in many Coleman and Fleetwood pop up campers.
Part number 4744B1741