Spacer assembly for cable backboard system

A cable backboard system (100) comprises a backboard (120), the backboard is provided with multiple openings (126) penetrating the backboard and mounting positions (140) approaching the openings, and guiding holes (142) are poisoned at the mounting positions. Each mounting position is provided with a reference surface (300). A cable frame (112) connected with the rear portion (124) of the backboard comprises a tray frame (114) with a frame (200). Spacer assemblies (220) are connected with the tray frame. Each spacer assembly is provided with a floating spacer (226) connected with the frame, a guiding pin (276) extending from the front portion of the floating spacer, and a spring (224). The springs abut against the floating spacers along a bias direction to enable the guiding pins (276) to be received in the guiding holes (142) and the front portions of the floating spacers to abut against the reference surfaces. Cable connector assemblies (106) are maintained by the corresponding spacer assemblies (220). Each connector assembly is provided with multiple cables (152) extending between at least two cable connectors (116) which are received in the corresponding openings (126) and are maintained in place by the spacer assemblies (220) relative to the reference surfaces (300).