These accessories are designed for use with Crestron® Cable Retractor Mounting Brackets (CBLRA-BRKT-FT). One insert is required to fill each unused cable retractor space. Two insert models are offered. The blank insert (CBLRA-INSERT-BLANK) is designed to fill the unused space with a solid metal cover. The 2-wire insert (CBLRA-INSERT-2WIRE) is similar, but provides two slotted holes through which additional non-retracting cables may be run.