Yep, exactly. They'd be hex or octagon shaped nuts that thread around the entire connector. They are very thin and tighten up very close against the back of the faceplate. On the front, there's what looks like a similar nut, but its molded into the metal of the connector and fits into a hex/oct countersink to prevent the connector from spinning while tightening the nut on the back.

Boy, I need to leave the technical writing to the technical writers.

Ken. VaSSallo Series M60v2, VP100v2, QS8v2 SVS SB12-Plus