When I was with Wilkinson Sword we supplied broadswords with two scabbards-- the brown leather scabbard was attached to the sam browne belt with a frog, whereas the nickle plated metal scabbard was worn either attached to the sam browne belt with a seperate frog, or attached to a baldric. Checking my 1910 edition of DRESS WORN AT COURT I note that gentlemen in highland attire wore a baldric to carry their sword. I suppose the method of sword suspension really will be determined by what you are wearing.