I've seen these vintage cleaning rods for the Webley 455 revolvers and read that they went on the back of the holster. I finally found a picture of what they look like. I wonder if Jake could add this to his Webley WG holster offering. I like it.
I found these on this site. They have some of the nicest vintage webley holsters I've seen!
When searching it doesn't work with multiple word, so either search for webley or holster.