Some time ago, my kids lost the pull handle for the cord that releases the catch, and you can manually operate the door. Ya! Kids Huh?

I printed it in Prusa Orange PETG.

Just thread the cord through the curved side, tie a knot, then pull on the rope. The knot will seat in the stepped hole.

IDEA: I just realized this could be used for any situation where you need a handle on a cord, like the pull start on a small engine.