Click to expand Tap to zoom Whelen CenCom Core Secondary Control Head Harness Kit by Whelen Engineering $6.18 | / SKU CCTLHARN 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Description Description CenCom Core™ Control Head Harness Kit, for use with any Non-Primary Control Head such as to connect a second Control Head, Control Heads Purchased Separately.