1. An accessory rod assembly for positioning cables and cable management accessories in a cable manager, the accessory rod assembly comprising:a base member having a front, a rear, and two sides, the front including a forward-facing socket, the rear including a first hook protruding rearwardly therefrom, and one of the two sides including a threaded portion;
an accessory rod having an extruded construction and a generally uniform, at least partially cylindrical cross-sectional shape along its length, the at least partially cylindrical cross-sectional shape being defined by two opposed arcuate portions interconnected by a midsection portion, wherein adjacent edges of the two opposed arcuate portions define a drop-in T-slot channel that extends along the length of the accessory rod; and
a rotatable knob having a handle and a threaded end received within the threaded portion of the base member;
wherein a proximal end of the accessory rod is received within the forward-facing socket of the base member such that the accessory rod extends forwardly from the base member; and
wherein the first hook is arrangeable to grasp a side of one or more ledges of a separate structure, and wherein the threaded end of the rotatable knob is arrangeable to bear on an opposite side of the one or more ledges of the separate structure, thereby facilitating the one or more ledges being clamped between the first hook and the rotatable knob and facilitating securement of the base member to the separate structure.