SAE (Zamp Solar) cap and retainer

After years of exposure to elements, the original plastic retainer thingy broke on mine. This may work with non-Zamp connectors, since this is just a standard SAE socket.

I didn't want to replace the full plug, so this is reusing one of the mounting screw to attach the retainer string. In the picture I've used Dyneema rope because I had some lying around, but anything should work, it is just retainer...