what is the locking plug and how do you...
what is the locking plug and how do you use it?
The orange or white rubber part is a locking plug that can be inserted in between the arm ends of the quick release buckle. Having the rubber plug inserted prevents any accidental release of the quick release buckle, and also tightens up the fit. The looped end of the plug can be attached to the thumbscrew to keep it secure when not locked into place.