Go to Google. Select images. Enter "motorcycle shotgun mount." There are lots of pics.
It's does look pretty similar to the ones we use. Most operate with a powered switch but also have a key lock. Some use a cuff key and others have a specific key like a pad lock would use. I wouldn't use the cuff key type on something like a motorcycle, too many people carry them.The upper latch or lock looks very similar to the police squad locks. They operate on 12 volt with a hidden release button